效果：

1.点击图标进入页面二

2.页面2图片暂停显示5秒进入页面三

3.点击页面三登陆按钮，打开登陆对话框，输入密码进入页面四

点击下载按钮，显示水平进度条

点击保存和获取用户名和密码 进入页面六 操作SharedPreferences

点击文本和文件 进入页面八

4.页面四是一个用BaseAdapt适配器加载的ListView,点击相册行时，跳转至页面五

点击地图时，跳转值页面七，gridview视图（图+字）

5.页面五是一个用GridView建的网格视图（图）

6.页面六 操作SharedPreferences

7.页面八，操作文本和文件的保存和获取

MainActivity.java

  1. package com.example.chenshuai.test404;
  2.  
  3. import android.content.Intent;
  4. import android.support.v7.app.AppCompatActivity;
  5. import android.os.Bundle;
  6. import android.view.View;
  7.  
  8. public class MainActivity extends AppCompatActivity {
  9.  
  10.     @Override
  11.     protected void onCreate(Bundle savedInstanceState) {
  12.         super.onCreate(savedInstanceState);
  13.         setContentView(R.layout.activity_main);
  14.     }
  15.  
  16.     public void onclick(View view)
  17.     {
  18.         Intent intent = new Intent(this,Activity1.class);
  19.         startActivity(intent);
  20.     }
  21. }

activity_main.xml

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     xmlns:tools="http://schemas.android.com/tools"
  4.     android:layout_width="match_parent"
  5.     android:layout_height="match_parent"
  6.     android:paddingBottom="@dimen/activity_vertical_margin"
  7.     android:paddingLeft="@dimen/activity_horizontal_margin"
  8.     android:paddingRight="@dimen/activity_horizontal_margin"
  9.     android:paddingTop="@dimen/activity_vertical_margin"
  10.     tools:context="com.example.chenshuai.test404.MainActivity">
  11.  
  12.    <ImageButton
  13.        android:layout_width="90dp"
  14.        android:layout_height="90dp"
  15.        android:src="@drawable/logo"
  16.        android:onClick="onclick"/>
  17. </RelativeLayout>

Activity1.java

  1. package com.example.chenshuai.test404;
  2.  
  3. import android.content.Intent;
  4. import android.os.Bundle;
  5. import android.support.v7.app.AppCompatActivity;
  6.  
  7. import java.util.Timer;
  8. import java.util.TimerTask;
  9.  
  10. /**
  11.  * Created by chenshuai on 2016/4/3.
  12.  */
  13. public class Activity1 extends AppCompatActivity {
  14.     @Override
  15.     protected void onCreate(Bundle savedInstanceState) {
  16.         super.onCreate(savedInstanceState);
  17.         setContentView(R.layout.activity1_layout);
  18.  
  19.         //图片暂停5秒后显示
  20.         final Intent it = new Intent(this, Activity2.class); //你要转向的Activity
  21.         Timer timer = new Timer();
  22.         TimerTask task = new TimerTask() {
  23.             @Override
  24.             public void run() {
  25.                 startActivity(it); //执行
  26.             }
  27.         };
  28.         timer.schedule(task, 1000 * 5); //5秒后
  29.  
  30.     }
  31. }

activity1_layout.xml

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     android:layout_width="match_parent"
  4.     android:layout_height="match_parent">
  5.  
  6.     <ImageView
  7.         android:layout_width="match_parent"
  8.         android:layout_height="match_parent"
  9.         android:background="@drawable/denglu"/>
  10.  
  11. </LinearLayout>

Activity2.java

  1. package com.example.chenshuai.test404;
  2.  
  3. import android.app.AlertDialog;
  4. import android.app.ProgressDialog;
  5. import android.content.DialogInterface;
  6. import android.content.Intent;
  7. import android.os.Bundle;
  8. import android.support.v7.app.AppCompatActivity;
  9. import android.view.LayoutInflater;
  10. import android.view.View;
  11. import android.widget.EditText;
  12. import android.widget.Toast;
  13.  
  14. /**
  15.  * Created by chenshuai on 2016/4/3.
  16.  */
  17. public class Activity2 extends AppCompatActivity {
  18.     @Override
  19.     protected void onCreate(Bundle savedInstanceState) {
  20.         super.onCreate(savedInstanceState);
  21.         setContentView(R.layout.activity2_layout);
  22.  
  23.     }
  24.  
  25.     public void onclik1(View view)
  26.     {
  27.  
  28.         //获取加载器
  29.         LayoutInflater layoutInflater = getLayoutInflater();
  30.         //加载layout文件
  31.         View vi_1 = layoutInflater.inflate(R.layout.login_layout,null);
  32.         //添加按钮
  33.         new AlertDialog.Builder(this)
  34.                 .setView(vi_1)
  35.                 .setNegativeButton("取消", null)
  36.                 .setPositiveButton("登陆", new DialogInterface.OnClickListener() {
  37.                     @Override
  38.                     public void onClick(DialogInterface dialog, int which) {
  39.  
  40.                         AlertDialog al = (AlertDialog) dialog;
  41.  
  42.                         EditText pwd = (EditText) al.findViewById(R.id.pwd);
  43.  
  44.                         String str = pwd.getText().toString();
  45.  
  46.                         if (str.equals("123")) {
  47.                             Intent intent = new Intent(Activity2.this, Activity3.class);
  48.                             startActivity(intent);
  49.                         } else {
  50.                             Toast.makeText(Activity2.this, "密码错误！", Toast.LENGTH_SHORT).show();
  51.                         }
  52.  
  53.                     }
  54.                 })
  55.                 .show();
  56.     }
  57.     public void onclick2(View v)
  58.     {
  59.         final ProgressDialog pd = new ProgressDialog(this);
  60.         pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
  61.  
  62.         pd.setMessage("下载进度");
  63.         pd.show();
  64.  
  65.         //创建thread实例  重写run方法  启动多线程
  66.         new Thread()
  67.         {
  68.             @Override
  69.             public void run() {
  70.                 super.run();
  71.                 for (int i = 0;i<=pd.getMax();i++)
  72.                 {
  73.                     try {
  74.                         Thread.sleep(100);
  75.                     }catch (Exception e)
  76.                     {}
  77.                     pd.setProgress(i);
  78.                 }
  79.                 pd.dismiss();
  80.             }
  81.         }.start();
  82.     }
  83.  
  84.     public void onclick3(View view)
  85.     {
  86.  
  87.         Intent intent = new Intent(this,Activity5.class);
  88.         startActivity(intent);
  89.     }
  90.     public void onclick4(View view)
  91.     {
  92.         Intent intent = new Intent(this,Activity7.class);
  93.         startActivity(intent);
  94.     }
  95.  
  96. }

activity2_layout.xml

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     android:layout_width="match_parent"
  4.     android:layout_height="match_parent"
  5.     android:orientation="vertical">
  6.  
  7.     <Button
  8.         android:layout_width="match_parent"
  9.         android:layout_height="wrap_content"
  10.         android:layout_gravity="center_horizontal"
  11.         android:background="@drawable/anniu1"
  12.         android:text="点击登陆"
  13.         android:textSize="20dp"
  14.         android:onClick="onclik1"
  15.         />
  16.     <Button
  17.         android:layout_width="match_parent"
  18.         android:layout_height="wrap_content"
  19.         android:background="@drawable/anniu2"
  20.         android:text="点击下载文件"
  21.         android:textSize="20dp"
  22.         android:onClick="onclick2"
  23.         />
  24.     <Button
  25.         android:layout_width="match_parent"
  26.         android:layout_height="wrap_content"
  27.         android:text="点击保存用户名和密码 key/value"
  28.         android:textSize="20dp"
  29.         android:background="@drawable/anniu13"
  30.         android:onClick="onclick3"/>
  31.     <Button
  32.         android:layout_width="match_parent"
  33.         android:layout_height="wrap_content"
  34.         android:text="点击文本和文件"
  35.         android:textSize="20dp"
  36.         android:background="@drawable/anniu1"
  37.         android:onClick="onclick4"/>
  38.  
  39. </LinearLayout>

login_layout.xml

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     android:layout_width="match_parent"
  4.     android:layout_height="match_parent"
  5.     android:orientation="vertical">
  6.  
  7.     <ImageView
  8.         android:layout_width="90dp"
  9.         android:layout_height="90dp"
  10.         android:src="@drawable/touxiang"
  11.         android:layout_marginTop="100dp"
  12.         android:layout_gravity="center_horizontal"/>
  13.     <TextView
  14.         android:layout_width="wrap_content"
  15.         android:layout_height="wrap_content"
  16.         android:text="15275969278"
  17.         android:textSize="20dp"
  18.         android:layout_gravity="center_horizontal"
  19.         android:layout_marginTop="10dp"
  20.         />
  21.     <EditText
  22.         android:layout_width="350dp"
  23.         android:layout_height="wrap_content"
  24.         android:layout_gravity="center_horizontal"
  25.         android:hint="请填写密码"
  26.        android:inputType="textPassword"
  27.         android:drawableLeft="@drawable/suo1"
  28.         android:layout_marginTop="20dp"
  29.         android:id="@+id/pwd"
  30.      />
  31.  
  32. </LinearLayout>

Activity3.java

  1. package com.example.chenshuai.test404;
  2.  
  3. import android.app.Activity;
  4. import android.content.Intent;
  5. import android.os.Bundle;
  6. import android.view.LayoutInflater;
  7. import android.view.View;
  8. import android.view.ViewGroup;
  9. import android.widget.AdapterView;
  10. import android.widget.BaseAdapter;
  11. import android.widget.ImageView;
  12. import android.widget.ListView;
  13. import android.widget.TextView;
  14.  
  15. import java.util.ArrayList;
  16. import java.util.List;
  17.  
  18. /**
  19.  * Created by chenshuai on 2016/4/4.
  20.  */
  21.  
  22. public class Activity3 extends Activity {
  23.     List<Biaozhi> bz;
  24.  
  25.     @Override
  26.     protected void onCreate(Bundle savedInstanceState) {
  27.         super.onCreate(savedInstanceState);
  28.         setContentView(R.layout.base_layout);
  29.  
  30.         ListView base_1 = (ListView)findViewById(R.id.base_1);
  31.  
  32.         bz = new ArrayList<Biaozhi>();
  33.         bz.add(new Biaozhi(R.drawable.dazhong,"大众点评"));
  34.         bz.add(new Biaozhi(R.drawable.gallery,"相册"));
  35.         bz.add(new Biaozhi(R.drawable.maps,"地图"));
  36.         bz.add(new Biaozhi(R.drawable.mm,"聊天"));
  37.         bz.add(new Biaozhi(R.drawable.netease,"网易新闻"));
  38.         bz.add(new Biaozhi(R.drawable.qq,"QQ"));
  39.         bz.add(new Biaozhi(R.drawable.settings,"设置"));
  40.         bz.add(new Biaozhi(R.drawable.sinaweibo,"新浪微博"));
  41.         bz.add(new Biaozhi(R.drawable.stormsmart,"暴风影音"));
  42.         bz.add(new Biaozhi(R.drawable.taobao,"淘宝"));
  43.         bz.add(new Biaozhi(R.drawable.videoplayer,"视频"));
  44.  
  45.         base_1.setAdapter(new mybaseadapt());
  46.  
  47.         base_1.setOnItemClickListener(new AdapterView.OnItemClickListener() {
  48.             @Override
  49.             public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
  50.  
  51.                 if (position == 1)
  52.                 {
  53.                     Intent in = new Intent(Activity3.this,Activity4.class);
  54.  
  55.                     startActivity(in);
  56.                 }
  57.                 if (position ==2)
  58.                 {
  59.                     Intent in = new Intent(Activity3.this,Activity6.class);
  60.  
  61.                     startActivity(in);
  62.                 }
  63.             }
  64.         });
  65.     }
  66.  
  67.     //抽象类 要继承并实现抽象方法后才能使用
  68.     class mybaseadapt extends BaseAdapter{
  69.         @Override
  70.         public int getCount() {
  71.             return bz.size();
  72.         }
  73.  
  74.         @Override
  75.         public Object getItem(int position) {
  76.             return bz.get(position);
  77.         }
  78.  
  79.         @Override
  80.         public long getItemId(int position) {
  81.             return position;
  82.         }
  83.  
  84.         //通过getView来实现Listview
  85.         //给视图适配数据返回view视图
  86.         //position 数据的下标（第几个视图）
  87.         //convertView 可重复使用的视图
  88.         //parent 父视图
  89.         @Override
  90.         public View getView(int position, View convertView, ViewGroup parent) {
  91.  
  92.             //如果convertView为null，就加载layout文件
  93.             if (convertView == null)
  94.             {
  95.                 //1.获取layout文件  用加载器
  96.                 LayoutInflater inflater = getLayoutInflater();
  97.  
  98.                 convertView = inflater.inflate(R.layout.activity3_layout,null);
  99.  
  100.             }
  101.  
  102.             //2.把数据放入layout文件中  数据和layout文件的视图组件进行绑定
  103.             //（1）从数据源里根据position获取数据
  104.             Biaozhi biaozhi = bz.get(position);
  105.  
  106.             //（2）获取layout文件的视图组件
  107.             ImageView iv_1 = (ImageView)convertView.findViewById(R.id.iv_1);
  108.             TextView tv_1 = (TextView)convertView.findViewById(R.id.tv_1);
  109.  
  110.             //(3)绑定  数据适配
  111.             iv_1.setImageResource(biaozhi.getImage());
  112.             tv_1.setText(biaozhi.getName());
  113.  
  114.             //3.返回视图
  115.             return convertView;
  116.         }
  117.     }
  118. }

base_layout.xml

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <ListView xmlns:android="http://schemas.android.com/apk/res/android"
  3.     android:layout_width="match_parent"
  4.     android:layout_height="match_parent"
  5.     android:id="@+id/base_1">
  6.  
  7. </ListView>

activity3_layout.xml

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     android:layout_width="match_parent"
  4.     android:layout_height="wrap_content"
  5.     android:layout_marginTop="20dp">
  6.  
  7.     <ImageView
  8.         android:layout_width="80dp"
  9.         android:layout_height="80dp"
  10.         android:src="@drawable/logo"
  11.         android:id="@+id/iv_1"/>
  12.  
  13.     <LinearLayout
  14.         android:layout_width="wrap_content"
  15.         android:layout_height="wrap_content"
  16.         android:orientation="vertical"
  17.         android:layout_gravity="center_vertical"
  18.         android:paddingLeft="20dp">
  19.  
  20.         <TextView
  21.             android:layout_width="wrap_content"
  22.             android:layout_height="wrap_content"
  23.             android:text="微信"
  24.             android:textSize="20dp"
  25.             android:id="@+id/tv_1"/>
  26.  
  27.     </LinearLayout>
  28.  
  29. </LinearLayout>

Activity4.java

  1. package com.example.chenshuai.test404;
  2.  
  3. import android.os.Bundle;
  4. import android.support.v7.app.AppCompatActivity;
  5. import android.view.View;
  6. import android.view.ViewGroup;
  7. import android.widget.BaseAdapter;
  8. import android.widget.GridView;
  9. import android.widget.ImageView;
  10.  
  11. public class Activity4 extends AppCompatActivity {
  12.  
  13.     int img[] = {R.drawable.dazhong,R.drawable.gallery,R.drawable.maps,R.drawable.mm,
  14.                  R.drawable.qq,R.drawable.settings,R.drawable.sinaweibo,R.drawable.netease,
  15.                  R.drawable.stormsmart,R.drawable.torchactivity,R.drawable.videoplayer};
  16.     @Override
  17.     protected void onCreate(Bundle savedInstanceState) {
  18.         super.onCreate(savedInstanceState);
  19.         setContentView(R.layout.activity_4);
  20.  
  21.         GridView grv_1 = (GridView)findViewById(R.id.grv_1);
  22.  
  23.         grv_1.setAdapter(new mygridview());
  24.     }
  25.  
  26.     class mygridview extends BaseAdapter{
  27.  
  28.         @Override
  29.         public int getCount() {
  30.             return img.length;
  31.         }
  32.  
  33.         @Override
  34.         public Object getItem(int position) {
  35.             return img[position];
  36.         }
  37.  
  38.         @Override
  39.         public long getItemId(int position) {
  40.             return position;
  41.         }
  42.  
  43.         @Override
  44.         public View getView(int position, View convertView, ViewGroup parent) {
  45.  
  46.             //先取数据
  47.             int imageid = img[position];
  48.  
  49.             //直接构造视图
  50.             ImageView imageView =null;
  51.  
  52.             if (convertView == null)
  53.             {
  54.                 imageView = new ImageView(Activity4.this);
  55.  
  56.                 imageView.setLayoutParams(new GridView.LayoutParams(200,200));
  57.             }
  58.             else
  59.             {
  60.                 imageView=(ImageView)convertView;
  61.             }
  62.             //给视图绑定数据
  63.             imageView.setImageResource(imageid);
  64.  
  65.             return imageView;
  66.         }
  67.     }
  68. }
  1. activity_4.xml
  1. <?xml version="1.0" encoding="utf-8"?>
  2. <GridView xmlns:android="http://schemas.android.com/apk/res/android"
  3.     android:layout_width="match_parent"
  4.     android:layout_height="match_parent"
  5.     android:numColumns="4"
  6.     android:verticalSpacing="10dp"
  7.     android:gravity="center"
  8.     android:stretchMode="columnWidth"
  9.     android:id="@+id/grv_1"
  10.     >
  11.  
  12. </GridView>

Activity5.java

  1. package com.example.chenshuai.test404;
  2.  
  3. import android.content.SharedPreferences;
  4. import android.support.v7.app.AppCompatActivity;
  5. import android.os.Bundle;
  6. import android.view.View;
  7. import android.widget.EditText;
  8. import android.widget.Toast;
  9.  
  10. public class Activity5 extends AppCompatActivity {
  11.  
  12.     EditText user;
  13.     EditText pwd;
  14.     SharedPreferences sp;
  15.     @Override
  16.     protected void onCreate(Bundle savedInstanceState) {
  17.         super.onCreate(savedInstanceState);
  18.         setContentView(R.layout.activity_5);
  19.  
  20.          user = (EditText)findViewById(R.id.user);
  21.          pwd = (EditText)findViewById(R.id.pwd);
  22.  
  23.         //1.获取sp的实例
  24.         sp = getSharedPreferences("mydata",MODE_PRIVATE);
  25.     }
  26.  
  27.     //保存
  28.     public void baocunclick(View view)
  29.     {
  30.         //1.获取数据
  31.         String username = user.getText().toString();
  32.         String password = pwd.getText().toString();
  33.  
  34.         //判断不为空
  35.         if (username.length() == 0 || password.length() ==0)
  36.         {
  37.  
  38.             Toast.makeText(Activity5.this, "用户名和密码不为空", Toast.LENGTH_SHORT).show();
  39.         }
  40.         else
  41.         {
  42.             //2.用Editor存储数据
  43.             //获取Editor
  44.             SharedPreferences.Editor editor_1 = sp.edit();
  45.  
  46.             //3.往编辑器里放数据(从上面获取的数据)
  47.             editor_1.putString(username,password);
  48.  
  49.             //4.提交保存
  50.             boolean b = editor_1.commit();
  51.  
  52.             if (b)
  53.             {
  54.                 Toast.makeText(Activity5.this, "保存成功", Toast.LENGTH_SHORT).show();
  55.             }
  56.             else
  57.             {
  58.                 Toast.makeText(Activity5.this, "保存失败", Toast.LENGTH_SHORT).show();
  59.             }
  60.  
  61.         }
  62.  
  63.     }
  64.  
  65.     //获取
  66.     public void huoquclick(View view)
  67.     {
  68.         //1.获取要读的key；
  69.         String key = user.getText().toString();
  70.  
  71.         //2.将通过用户名读取的密码放入第二个Edittext
  72.         pwd.setText(sp.getString(key,"没有发现用户名"));
  73.     }
  74. }

activity_5.xml

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     xmlns:tools="http://schemas.android.com/tools"
  4.     android:layout_width="match_parent"
  5.     android:layout_height="match_parent"
  6.     tools:context="com.example.chenshuai.test404.Activity5"
  7.     android:orientation="vertical">
  8.  
  9.     <EditText
  10.         android:layout_width="match_parent"
  11.         android:layout_height="wrap_content"
  12.         android:hint="用户名："
  13.         android:id="@+id/user"/>
  14.     <EditText
  15.         android:layout_width="match_parent"
  16.         android:layout_height="wrap_content"
  17.         android:hint="密码："
  18.         android:id="@+id/pwd"/>
  19.     <LinearLayout
  20.         android:layout_width="match_parent"
  21.         android:layout_height="wrap_content">
  22.  
  23.         <Button
  24.             android:layout_width="0dp"
  25.             android:layout_height="wrap_content"
  26.             android:layout_weight="1"
  27.             android:text="保存"
  28.             android:id="@+id/baocun"
  29.             android:onClick="baocunclick"/>
  30.         <Button
  31.             android:layout_width="0dp"
  32.             android:layout_height="wrap_content"
  33.             android:layout_weight="1"
  34.             android:text="获取"
  35.             android:id="@+id/huoqu"
  36.             android:onClick="huoquclick"/>
  37.     </LinearLayout>
  38.  
  39. </LinearLayout>

Activity6.java

  1. package com.example.chenshuai.test404;
  2.  
  3. import android.os.Bundle;
  4. import android.support.v7.app.AppCompatActivity;
  5. import android.view.LayoutInflater;
  6. import android.view.View;
  7. import android.view.ViewGroup;
  8. import android.widget.BaseAdapter;
  9. import android.widget.GridView;
  10. import android.widget.ImageView;
  11. import android.widget.TextView;
  12.  
  13. import java.util.ArrayList;
  14. import java.util.List;
  15.  
  16. public class Activity6 extends AppCompatActivity {
  17.  
  18.     List<Biaozhi> bz;
  19.     @Override
  20.     protected void onCreate(Bundle savedInstanceState) {
  21.         super.onCreate(savedInstanceState);
  22.         setContentView(R.layout.activity_6);
  23.  
  24.         GridView gv_1 = (GridView)findViewById(R.id.gv_1);
  25.  
  26.         bz = new ArrayList<Biaozhi>();
  27.         bz.add(new Biaozhi(R.drawable.dazhong,"大众点评"));
  28.         bz.add(new Biaozhi(R.drawable.gallery,"相册"));
  29.         bz.add(new Biaozhi(R.drawable.maps,"地图"));
  30.         bz.add(new Biaozhi(R.drawable.mm,"聊天"));
  31.         bz.add(new Biaozhi(R.drawable.netease,"网易新闻"));
  32.         bz.add(new Biaozhi(R.drawable.qq,"QQ"));
  33.         bz.add(new Biaozhi(R.drawable.settings,"设置"));
  34.         bz.add(new Biaozhi(R.drawable.sinaweibo, "新浪微博"));
  35.         bz.add(new Biaozhi(R.drawable.stormsmart, "暴风影音"));
  36.         bz.add(new Biaozhi(R.drawable.taobao,"淘宝"));
  37.         bz.add(new Biaozhi(R.drawable.videoplayer,"视频"));
  38.  
  39.         gv_1.setAdapter(new grid_baseadapter());
  40.     }
  41.  
  42.     //抽象类 要继承并实现抽象方法后才能使用
  43.     class grid_baseadapter extends BaseAdapter
  44.     {
  45.         @Override
  46.         public int getCount() {
  47.             return bz.size();
  48.         }
  49.  
  50.         @Override
  51.         public Object getItem(int position) {
  52.             return bz.get(position);
  53.         }
  54.  
  55.         @Override
  56.         public long getItemId(int position) {
  57.             return position;
  58.         }
  59.  
  60.         //通过getView来实现Listview
  61.         //给视图适配数据返回view视图
  62.         //position 数据的下标（第几个视图）
  63.         //convertView 可重复使用的视图
  64.         //parent 父视图
  65.         @Override
  66.         public View getView(int position, View convertView, ViewGroup parent) {
  67.  
  68.             //如果convertView为null，就加载layout文件
  69.             if (convertView == null)
  70.             {
  71.                 //1.获取layout文件  用加载器
  72.                 LayoutInflater inflater = getLayoutInflater();
  73.  
  74.                 convertView = inflater.inflate(R.layout.layout_6_1,null);
  75.  
  76.             }
  77.             //2.把数据放入layout文件中  数据和layout文件的视图组件进行绑定
  78.             //（1）从数据源里根据position获取数据
  79.             Biaozhi biaozhi = bz.get(position);
  80.  
  81.             //（2）获取layout文件的视图组件
  82.             ImageView iv_2 = (ImageView)convertView.findViewById(R.id.iv_2);
  83.             TextView tv_2 = (TextView)convertView.findViewById(R.id.tv_2);
  84.  
  85.             //(3)绑定  数据适配
  86.             iv_2.setImageResource(biaozhi.getImage());
  87.             tv_2.setText(biaozhi.getName());
  88.  
  89.             //3.返回视图
  90.             return convertView;
  91.         }
  92.     }
  93. }

Biaozhi.java

  1. package com.example.chenshuai.test404;
  2.  
  3. /**
  4.  * Created by chenshuai on 2016/4/7.
  5.  */
  6. public class Biaozhi {
  7.  
  8.     private int image;
  9.  
  10.     private String name;
  11.  
  12.     public int getImage() {
  13.         return image;
  14.     }
  15.  
  16.     public String getName() {
  17.         return name;
  18.     }
  19.  
  20.     public void setImage(int image) {
  21.         this.image = image;
  22.     }
  23.  
  24.     public void setName(String name) {
  25.         this.name = name;
  26.     }
  27.  
  28.     public Biaozhi(int image, String name) {
  29.         this.image = image;
  30.         this.name = name;
  31.     }
  32.  
  33.     public Biaozhi()
  34.     {
  35.  
  36.     }
  37.  
  38.     @Override
  39.     public String toString() {
  40.         return "Biaozhi{" +
  41.                 "image=" + image +
  42.                 ", name='" + name + '\'' +
  43.                 '}';
  44.     }
  45. }

Activity_6.xml

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <GridView xmlns:android="http://schemas.android.com/apk/res/android"
  3.     android:layout_width="match_parent"
  4.     android:layout_height="match_parent"
  5.     android:id="@+id/gv_1"
  6.     android:numColumns="4"
  7.     android:verticalSpacing="10dp"
  8.     android:stretchMode="columnWidth"
  9.    >
  10. </GridView>

Activity_6_1.xml

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     android:layout_width="match_parent"
  4.     android:layout_height="match_parent"
  5.     android:orientation="vertical">
  6.  
  7.     <ImageView
  8.         android:layout_width="120dp"
  9.         android:layout_height="120dp"
  10.         android:src="@drawable/dazhong"
  11.         android:id="@+id/iv_2"/>
  12.     <TextView
  13.         android:layout_width="120dp"
  14.         android:layout_height="wrap_content"
  15.         android:text="大众点评"
  16.         android:textSize="20dp"
  17.         android:gravity="center"
  18.         android:id="@+id/tv_2"/>
  19.  
  20. </LinearLayout>

Activity7.java

  1. package com.example.chenshuai.test404;
  2.  
  3. import android.content.res.AssetManager;
  4. import android.graphics.Bitmap;
  5. import android.graphics.BitmapFactory;
  6. import android.os.Bundle;
  7. import android.support.v7.app.AppCompatActivity;
  8. import android.view.View;
  9. import android.widget.EditText;
  10. import android.widget.ImageView;
  11. import android.widget.Toast;
  12.  
  13. import java.io.FileInputStream;
  14. import java.io.FileOutputStream;
  15. import java.io.InputStream;
  16. import java.io.PrintStream;
  17.  
  18. public class Activity7 extends AppCompatActivity {
  19.     EditText et_1;
  20.     EditText et_2;
  21.  
  22.     ImageView iv_3;
  23.     @Override
  24.     protected void onCreate(Bundle savedInstanceState) {
  25.         super.onCreate(savedInstanceState);
  26.         setContentView(R.layout.activity_7);
  27.  
  28.         et_1 = (EditText)findViewById(R.id.et_1);
  29.         et_2 = (EditText)findViewById(R.id.et_2);
  30.  
  31.         iv_3 = (ImageView)findViewById(R.id.iv_3);
  32.     }
  33.  
  34.     final String FILENAME = "text.txt";
  35.     public void baocunwenben_onclick(View view)
  36.     {
  37.  
  38.         //1.获取要存储的内容
  39.         String content = et_1.getText().toString();
  40.  
  41.         //2.获取输出流 以数据为基准 从手机存储往文件走为输出流
  42.         try {
  43.             //追加模式
  44.             FileOutputStream fos = openFileOutput(FILENAME,MODE_APPEND);
  45.  
  46.             //3.构造打印流 PrintStream
  47.             PrintStream ps = new PrintStream(fos);
  48.  
  49.             //4.写入内容（换行）
  50.             ps.println(content);
  51.  
  52.             //5.关闭
  53.             ps.close();
  54.             fos.close();
  55.  
  56.             Toast.makeText(Activity7.this, "保存成功", Toast.LENGTH_SHORT).show();
  57.  
  58.         } catch (Exception e) {
  59.             e.printStackTrace();
  60.             Toast.makeText(Activity7.this, "保存失败", Toast.LENGTH_SHORT).show();
  61.         }
  62.  
  63.     }
  64.     //获取
  65.     public void huoquwenben_onclick(View view)
  66.     {
  67.  
  68.         //1.获取输入流  从文件到手机存储
  69.         try {
  70.             FileInputStream fis = openFileInput(FILENAME);
  71.  
  72.             //2.用数组方法读取
  73.             //定义读取的数组
  74.  
  75.             byte[] b = new byte[1024];
  76.             //3.读出的数据的长度
  77.             int i = 0;
  78.  
  79.             StringBuilder sbr = new StringBuilder();
  80.  
  81.             //fis.read(b)返回长度
  82.             while ((i = fis.read(b))>0)
  83.             {
  84.                 //在这里需要字符串，转为字符串
  85.                 sbr.append(new String(b,0,i));
  86.             }
  87.  
  88.             fis.close();
  89.  
  90.             et_2.setText(sbr);
  91.  
  92.             Toast.makeText(Activity7.this, "读取成功", Toast.LENGTH_SHORT).show();
  93.  
  94.         } catch (Exception e) {
  95.             e.printStackTrace();
  96.             Toast.makeText(Activity7.this, "读取失败", Toast.LENGTH_SHORT).show();
  97.         }
  98.     }
  99.     //操作assets内的文件
  100.     public void baocuntupianwj_onclick(View view)
  101.     {
  102.         //1.获取AssetManager
  103.         AssetManager assetManager = getAssets();
  104.  
  105.         //2.打开文件  返回输入流 把文件读到内存里
  106.         try {
  107.             InputStream is = assetManager.open("zixingche.jpg");
  108.  
  109.             //3.获取输出流
  110.             FileOutputStream fos = openFileOutput("zixingche2.jpg",MODE_PRIVATE);
  111.  
  112.             //4.边读边写
  113.             byte[] b =new byte[1024];
  114.  
  115.             int i = 0;
  116.  
  117.             while((i = is.read(b))>0)
  118.             {
  119.                 fos.write(b, 0, i);
  120.             }
  121.  
  122.             fos.close();
  123.             is.close();
  124.  
  125.             Toast.makeText(Activity7.this, "保存成功", Toast.LENGTH_SHORT).show();
  126.  
  127.         } catch (Exception e) {
  128.             e.printStackTrace();
  129.         }
  130.     }
  131.     //读取文件 从手机内部存储读图片文件
  132.     public void huoqutupianwj_onclick(View view)
  133.     {
  134.         //改变ImageView的图片来源，指向手机存储空间
  135.  
  136.         //1.获取文件存储的绝对路径
  137.         String filepath  = getFilesDir().getAbsolutePath();
  138.  
  139.         //2.组合完整路径
  140.         filepath += "/zixingche2.jpg";
  141.  
  142.         Toast.makeText(Activity7.this, "path= "+filepath, Toast.LENGTH_SHORT).show();
  143.  
  144.         //3.生成位图实例
  145.         Bitmap bm = BitmapFactory.decodeFile(filepath);
  146.  
  147.         //4.改变ImageView的图片来源 显示图片
  148.         iv_3.setImageBitmap(bm);
  149.     }
  150. }

Activity_7.xml

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     android:layout_width="match_parent"
  4.     android:layout_height="match_parent"
  5.     android:orientation="vertical"
  6.     >
  7.     <EditText
  8.         android:layout_width="match_parent"
  9.         android:layout_height="wrap_content"
  10.         android:hint="输入要保存的文本"
  11.         android:id="@+id/et_1"/>
  12.     <EditText
  13.         android:layout_width="match_parent"
  14.         android:layout_height="wrap_content"
  15.         android:hint="显示保存的文本"
  16.         android:id="@+id/et_2"/>
  17.     <LinearLayout
  18.         android:layout_width="match_parent"
  19.         android:layout_height="wrap_content"
  20.         android:orientation="horizontal">
  21.  
  22.         <Button
  23.             android:layout_width="0dp"
  24.             android:layout_height="match_parent"
  25.             android:text="点击保存文本"
  26.             android:layout_weight="1"
  27.             android:onClick="baocunwenben_onclick"/>
  28.         <Button
  29.             android:layout_width="0dp"
  30.             android:layout_height="match_parent"
  31.             android:text="点击获取文本"
  32.             android:layout_weight="1"
  33.             android:onClick="huoquwenben_onclick"/>
  34.  
  35.     </LinearLayout>
  36.     <LinearLayout
  37.         android:layout_width="match_parent"
  38.         android:layout_height="wrap_content"
  39.         android:orientation="horizontal">
  40.  
  41.         <Button
  42.             android:layout_width="0dp"
  43.             android:layout_height="match_parent"
  44.             android:text="点击保存图片文件"
  45.             android:layout_weight="1"
  46.             android:onClick="baocuntupianwj_onclick"/>
  47.         <Button
  48.             android:layout_width="0dp"
  49.             android:layout_height="match_parent"
  50.             android:text="点击获取图片文件"
  51.             android:layout_weight="1"
  52.             android:onClick="huoqutupianwj_onclick"/>
  53.  
  54.     </LinearLayout>
  55.     <ImageView
  56.         android:layout_width="wrap_content"
  57.         android:layout_height="wrap_content"
  58.         android:src="@drawable/touxiang"
  59.         android:layout_gravity="center"
  60.         android:id="@+id/iv_3"
  61.         />
  62.  
  63. </LinearLayout>

AndroidManifest.xml

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <manifest xmlns:android="http://schemas.android.com/apk/res/android"
  3.     package="com.example.chenshuai.test404">
  4.  
  5.     <application
  6.         android:allowBackup="true"
  7.         android:icon="@mipmap/ic_launcher"
  8.         android:label="@string/app_name"
  9.         android:supportsRtl="true"
  10.         android:theme="@style/AppTheme">
  11.         <activity android:name=".MainActivity">
  12.             <intent-filter>
  13.                 <action android:name="android.intent.action.MAIN" />
  14.  
  15.                 <category android:name="android.intent.category.LAUNCHER" />
  16.             </intent-filter>
  17.         </activity>
  18.         <activity android:name=".Activity1">
  19.             <intent-filter>
  20.                 <action android:name="android.intent.action.VIEW" />
  21.  
  22.                 <category android:name="android.intent.category.DEFAULT" />
  23.             </intent-filter>
  24.         </activity>
  25.         <activity android:name=".Activity2">
  26.             <intent-filter>
  27.                 <action android:name="android.intent.action.VIEW" />
  28.  
  29.                 <category android:name="android.intent.category.DEFAULT" />
  30.             </intent-filter>
  31.         </activity>
  32.         <activity android:name=".Activity3">
  33.             <intent-filter>
  34.                 <action android:name="android.intent.action.VIEW" />
  35.  
  36.                 <category android:name="android.intent.category.DEFAULT" />
  37.             </intent-filter>
  38.         </activity>
  39.         <activity android:name=".Activity4">
  40.             <intent-filter>
  41.                 <action android:name="android.intent.action.VIEW" />
  42.  
  43.                 <category android:name="android.intent.category.DEFAULT" />
  44.             </intent-filter>
  45.         </activity>
  46.         <activity android:name=".Activity5">
  47.             <intent-filter>
  48.                 <action android:name="android.intent.action.VIEW" />
  49.  
  50.                 <category android:name="android.intent.category.DEFAULT" />
  51.             </intent-filter>
  52.         </activity>
  53.         <activity android:name=".Activity6">
  54.             <intent-filter>
  55.                 <action android:name="android.intent.action.VIEW" />
  56.  
  57.                 <category android:name="android.intent.category.DEFAULT" />
  58.             </intent-filter>
  59.         </activity>
  60.         <activity android:name=".Activity7">
  61.             <intent-filter>
  62.                 <action android:name="android.intent.action.VIEW" />
  63.  
  64.                 <category android:name="android.intent.category.DEFAULT" />
  65.             </intent-filter>
  66.         </activity>
  67.     </application>
  68.  
  69. </manifest>

AndroidManifest.xml

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