1.  package com.example.alimjan.hello_world.Utils;
  2.  
  3.  import android.graphics.Bitmap;
  4.  import android.graphics.BitmapFactory;
  5.  
  6.  import java.io.BufferedInputStream;
  7.  import java.io.BufferedOutputStream;
  8.  import java.io.File;
  9.  import java.io.FileInputStream;
  10.  import java.io.FileOutputStream;
  11.  import java.io.FilenameFilter;
  12.  import java.util.ArrayList;
  13.  import java.util.Locale;
  14.  
  15.  public class FileUtil {
  16.  
  17.      public static void saveText(String path, String txt) {
  18.          try {
  19.              FileOutputStream fos = new FileOutputStream(path);
  20.              fos.write(txt.getBytes());
  21.              fos.close();
  22.          } catch (Exception e) {
  23.              e.printStackTrace();
  24.          }
  25.      }
  26.  
  27.      public static String openText(String path) {
  28.          String readStr = "";
  29.          try {
  30.              FileInputStream fis = new FileInputStream(path);
  31.              byte[] b = new byte[fis.available()];
  32.              fis.read(b);
  33.              readStr = new String(b);
  34.              fis.close();
  35.          } catch (Exception e) {
  36.              e.printStackTrace();
  37.          }
  38.          return readStr;
  39.      }
  40.  
  41.      public static void saveImage(String path, Bitmap bitmap) {
  42.          try {
  43.              BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(path));
  44.              bitmap.compress(Bitmap.CompressFormat.JPEG, 80, bos);
  45.              bos.flush();
  46.              bos.close();
  47.          } catch (Exception e) {
  48.              e.printStackTrace();
  49.          }
  50.      }
  51.  
  52.      public static Bitmap openImage(String path) {
  53.          Bitmap bitmap = null;
  54.          try {
  55.              BufferedInputStream bis = new BufferedInputStream(new FileInputStream(path));
  56.              bitmap = BitmapFactory.decodeStream(bis);
  57.              bis.close();
  58.          } catch (Exception e) {
  59.              e.printStackTrace();
  60.          }
  61.          return bitmap;
  62.      }
  63.  
  64.      public static ArrayList<File> getFileList(String path, String[] extendArray) {
  65.          ArrayList<File> displayedContent = new ArrayList<File>();
  66.          File[] files = null;
  67.          File directory = new File(path);
  68.          if (extendArray != null && extendArray.length>0) {
  69.              FilenameFilter fileFilter = getTypeFilter(extendArray);
  70.              files = directory.listFiles(fileFilter);
  71.          } else {
  72.              files = directory.listFiles();
  73.          }
  74.  
  75.          if (files != null) {
  76.              for (File f : files) {
  77.                  if (!f.isDirectory() && !f.isHidden()) {
  78.                      displayedContent.add(f);
  79.                  }
  80.              }
  81.          }
  82.          return displayedContent;
  83.      }
  84.  
  85.      public static FilenameFilter getTypeFilter(String[] extendArray) {
  86.          final ArrayList<String> fileExtensions = new ArrayList<String>();
  87.          for (int i=0; i<extendArray.length; i++) {
  88.              fileExtensions.add(extendArray[i]);
  89.          }
  90.          FilenameFilter fileNameFilter = new FilenameFilter() {
  91.              @Override
  92.              public boolean accept(File directory, String fileName) {
  93.                  boolean matched = false;
  94.                  File f = new File(String.format("%s/%s",
  95.                          directory.getAbsolutePath(), fileName));
  96.                  matched = f.isDirectory();
  97.                  if (!matched) {
  98.                      for (String s : fileExtensions) {
  99.                          s = String.format(".{0,}\\%s$", s);
  100.                          s = s.toUpperCase(Locale.getDefault());
  101.                          fileName = fileName.toUpperCase(Locale.getDefault());
  102.                          matched = fileName.matches(s);
  103.                          if (matched) {
  104.                              break;
  105.                          }
  106.                      }
  107.                  }
  108.                  return matched;
  109.              }
  110.          };
  111.          return fileNameFilter;
  112.      }
  113.  
  114.  }
  1.  package com.example.alimjan.hello_world;
  2.  
  3.  /**
  4.   * Created by alimjan on 7/5/2017.
  5.   */
  6.  
  7.          import android.content.Context;
  8.          import android.content.Intent;
  9.          import android.graphics.Bitmap;
  10.          import android.os.Bundle;
  11.          import android.os.Environment;
  12.          import android.support.v7.app.AppCompatActivity;
  13.          import android.view.View;
  14.          import android.view.View.OnClickListener;
  15.          import android.widget.AdapterView;
  16.          import android.widget.ArrayAdapter;
  17.          import android.widget.EditText;
  18.          import android.widget.LinearLayout;
  19.          import android.widget.Spinner;
  20.          import android.widget.TextView;
  21.          import android.widget.Toast;
  22.          import android.widget.AdapterView.OnItemSelectedListener;
  23.  
  24.          import com.example.alimjan.hello_world.Utils.DateUtil;
  25.          import com.example.alimjan.hello_world.Utils.FileUtil;
  26.  
  27.  public class class_4_3_3 extends AppCompatActivity implements OnClickListener {
  28.  
  29.      private LinearLayout ll_info;
  30.      private EditText et_name;
  31.      private EditText et_age;
  32.      private EditText et_height;
  33.      private EditText et_weight;
  34.      private boolean bMarried = false;
  35.  
  36.      private String mPath;
  37.      private TextView tv_path;
  38.  
  39.      @Override
  40.      protected void onCreate(Bundle savedInstanceState) {
  41.          super.onCreate(savedInstanceState);
  42.          setContentView(R.layout.code_4_3_3);
  43.          ll_info = (LinearLayout) findViewById(R.id.ll_info);
  44.          et_name = (EditText) findViewById(R.id.et_name);
  45.          et_age = (EditText) findViewById(R.id.et_age);
  46.          et_height = (EditText) findViewById(R.id.et_height);
  47.          et_weight = (EditText) findViewById(R.id.et_weight);
  48.          tv_path = (TextView) findViewById(R.id.tv_path);
  49.          findViewById(R.id.btn_save).setOnClickListener(this);
  50.  
  51.          ArrayAdapter<String> typeAdapter = new ArrayAdapter<String>(this,
  52.                  R.layout.item_select, typeArray);
  53.          typeAdapter.setDropDownViewResource(R.layout.item_dropdown);
  54.          Spinner sp_married = (Spinner) findViewById(R.id.sp_married);
  55.          sp_married.setPrompt("请选择婚姻状况");
  56.          sp_married.setAdapter(typeAdapter);
  57.          sp_married.setSelection(0);
  58.          sp_married.setOnItemSelectedListener(new TypeSelectedListener());
  59.  
  60.          mPath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/";
  61.      }
  62.  
  63.      private String[] typeArray = {"未婚", "已婚"};
  64.      class TypeSelectedListener implements OnItemSelectedListener {
  65.          public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
  66.              bMarried = (arg2==0)?false:true;
  67.          }
  68.  
  69.          public void onNothingSelected(AdapterView<?> arg0) {
  70.          }
  71.      }
  72.  
  73.      @Override
  74.      public void onClick(View v) {
  75.          if (v.getId() == R.id.btn_save) {
  76.              String name = et_name.getText().toString();
  77.              String age = et_age.getText().toString();
  78.              String height = et_height.getText().toString();
  79.              String weight = et_weight.getText().toString();
  80.              if (name==null || name.length()<=0) {
  81.                  showToast("请先填写姓名");
  82.                  return;
  83.              }
  84.              if (age==null || age.length()<=0) {
  85.                  showToast("请先填写年龄");
  86.                  return;
  87.              }
  88.              if (height==null || height.length()<=0) {
  89.                  showToast("请先填写身高");
  90.                  return;
  91.              }
  92.              if (weight==null || weight.length()<=0) {
  93.                  showToast("请先填写体重");
  94.                  return;
  95.              }
  96.  
  97.              if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED) == true) {
  98.                  Bitmap bitmap = ll_info.getDrawingCache();
  99.                  String file_path = mPath + DateUtil.getCurDateStr("") + ".png";
  100.                  FileUtil.saveImage(file_path, bitmap);
  101.                  bitmap.recycle();
  102.                  tv_path.setText("用户注册信息图片的保存路径为：\n"+file_path);
  103.                  showToast("图片已存入SD卡文件");
  104.              } else {
  105.                  showToast("未发现已挂载的SD卡，请检查");
  106.              }
  107.          }
  108.      }
  109.  
  110.      @Override
  111.      protected void onStart() {
  112.          super.onStart();
  113.          ll_info.setDrawingCacheEnabled(true);
  114.      }
  115.  
  116.      @Override
  117.      protected void onStop() {
  118.          super.onStop();
  119.          ll_info.setDrawingCacheEnabled(false);
  120.      }
  121.  
  122.      private void showToast(String desc) {
  123.          Toast.makeText(this, desc, Toast.LENGTH_SHORT).show();
  124.      }
  125.  
  126.      public static void startHome(Context mcontext){
  127.          Intent intent = new Intent(mcontext,class_4_3_3.class);
  128.          mcontext.startActivity(intent);
  129.      }
  130.  
  131.  }
  1.  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  2.      android:layout_width="match_parent"
  3.      android:layout_height="match_parent"
  4.      android:focusable="true"
  5.      android:focusableInTouchMode="true"
  6.      android:orientation="vertical"
  7.      android:padding="10dp" >
  8.  
  9.      <LinearLayout
  10.          android:id="@+id/ll_info"
  11.          android:layout_width="match_parent"
  12.          android:layout_height="wrap_content"
  13.          android:background="#f9f9f9"
  14.          android:orientation="vertical" >
  15.  
  16.          <RelativeLayout
  17.              android:layout_width="match_parent"
  18.              android:layout_height="50dp" >
  19.  
  20.              <TextView
  21.                  android:id="@+id/tv_name"
  22.                  android:layout_width="wrap_content"
  23.                  android:layout_height="match_parent"
  24.                  android:layout_alignParentLeft="true"
  25.                  android:gravity="center"
  26.                  android:text="姓名："
  27.                  android:textColor="@color/black"
  28.                  android:textSize="17sp" />
  29.  
  30.              <EditText
  31.                  android:id="@+id/et_name"
  32.                  android:layout_width="match_parent"
  33.                  android:layout_height="match_parent"
  34.                  android:layout_marginBottom="5dp"
  35.                  android:layout_marginTop="5dp"
  36.                  android:layout_toRightOf="@+id/tv_name"
  37.                  android:background="@drawable/editext_selector"
  38.                  android:gravity="left|center"
  39.                  android:hint="请输入姓名"
  40.                  android:inputType="text"
  41.                  android:maxLength="12"
  42.                  android:textColor="@color/black"
  43.                  android:textColorHint="@color/grey"
  44.                  android:textCursorDrawable="@drawable/text_cursor"
  45.                  android:textSize="17sp" />
  46.          </RelativeLayout>
  47.  
  48.          <RelativeLayout
  49.              android:layout_width="match_parent"
  50.              android:layout_height="50dp" >
  51.  
  52.              <TextView
  53.                  android:id="@+id/tv_age"
  54.                  android:layout_width="wrap_content"
  55.                  android:layout_height="match_parent"
  56.                  android:layout_alignParentLeft="true"
  57.                  android:gravity="center"
  58.                  android:text="年龄："
  59.                  android:textColor="@color/black"
  60.                  android:textSize="17sp" />
  61.  
  62.              <EditText
  63.                  android:id="@+id/et_age"
  64.                  android:layout_width="match_parent"
  65.                  android:layout_height="match_parent"
  66.                  android:layout_marginBottom="5dp"
  67.                  android:layout_marginTop="5dp"
  68.                  android:layout_toRightOf="@+id/tv_age"
  69.                  android:background="@drawable/editext_selector"
  70.                  android:gravity="left|center"
  71.                  android:hint="请输入年龄"
  72.                  android:inputType="number"
  73.                  android:maxLength="2"
  74.                  android:textColor="@color/black"
  75.                  android:textColorHint="@color/grey"
  76.                  android:textCursorDrawable="@drawable/text_cursor"
  77.                  android:textSize="17sp" />
  78.          </RelativeLayout>
  79.  
  80.          <RelativeLayout
  81.              android:layout_width="match_parent"
  82.              android:layout_height="50dp" >
  83.  
  84.              <TextView
  85.                  android:id="@+id/tv_height"
  86.                  android:layout_width="wrap_content"
  87.                  android:layout_height="match_parent"
  88.                  android:layout_alignParentLeft="true"
  89.                  android:gravity="center"
  90.                  android:text="身高："
  91.                  android:textColor="@color/black"
  92.                  android:textSize="17sp" />
  93.  
  94.              <EditText
  95.                  android:id="@+id/et_height"
  96.                  android:layout_width="match_parent"
  97.                  android:layout_height="match_parent"
  98.                  android:layout_marginBottom="5dp"
  99.                  android:layout_marginTop="5dp"
  100.                  android:layout_toRightOf="@+id/tv_height"
  101.                  android:background="@drawable/editext_selector"
  102.                  android:gravity="left|center"
  103.                  android:hint="请输入身高"
  104.                  android:inputType="number"
  105.                  android:maxLength="3"
  106.                  android:textColor="@color/black"
  107.                  android:textColorHint="@color/grey"
  108.                  android:textCursorDrawable="@drawable/text_cursor"
  109.                  android:textSize="17sp" />
  110.          </RelativeLayout>
  111.  
  112.          <RelativeLayout
  113.              android:layout_width="match_parent"
  114.              android:layout_height="50dp" >
  115.  
  116.              <TextView
  117.                  android:id="@+id/tv_weight"
  118.                  android:layout_width="wrap_content"
  119.                  android:layout_height="match_parent"
  120.                  android:layout_alignParentLeft="true"
  121.                  android:gravity="center"
  122.                  android:text="体重："
  123.                  android:textColor="@color/black"
  124.                  android:textSize="17sp" />
  125.  
  126.              <EditText
  127.                  android:id="@+id/et_weight"
  128.                  android:layout_width="match_parent"
  129.                  android:layout_height="match_parent"
  130.                  android:layout_marginBottom="5dp"
  131.                  android:layout_marginTop="5dp"
  132.                  android:layout_toRightOf="@+id/tv_weight"
  133.                  android:background="@drawable/editext_selector"
  134.                  android:gravity="left|center"
  135.                  android:hint="请输入体重"
  136.                  android:inputType="numberDecimal"
  137.                  android:maxLength="5"
  138.                  android:textColor="@color/black"
  139.                  android:textColorHint="@color/grey"
  140.                  android:textCursorDrawable="@drawable/text_cursor"
  141.                  android:textSize="17sp" />
  142.          </RelativeLayout>
  143.  
  144.          <RelativeLayout
  145.              android:layout_width="match_parent"
  146.              android:layout_height="50dp" >
  147.  
  148.              <TextView
  149.                  android:id="@+id/tv_married"
  150.                  android:layout_width="wrap_content"
  151.                  android:layout_height="match_parent"
  152.                  android:layout_alignParentLeft="true"
  153.                  android:gravity="center"
  154.                  android:text="婚否："
  155.                  android:textColor="@color/black"
  156.                  android:textSize="17sp" />
  157.  
  158.              <Spinner
  159.                  android:id="@+id/sp_married"
  160.                  android:layout_width="match_parent"
  161.                  android:layout_height="match_parent"
  162.                  android:layout_toRightOf="@+id/tv_married"
  163.                  android:gravity="left|center"
  164.                  android:spinnerMode="dialog" />
  165.          </RelativeLayout>
  166.      </LinearLayout>
  167.  
  168.      <Button
  169.          android:id="@+id/btn_save"
  170.          android:layout_width="match_parent"
  171.          android:layout_height="wrap_content"
  172.          android:text="保存图片到SD卡"
  173.          android:textColor="@color/black"
  174.          android:textSize="20sp" />
  175.  
  176.      <TextView
  177.          android:id="@+id/tv_path"
  178.          android:layout_width="wrap_content"
  179.          android:layout_height="match_parent"
  180.          android:textColor="@color/black"
  181.          android:textSize="17sp" />
  182.  
  183.  </LinearLayout>

  1.  package com.example.alimjan.hello_world;
  2.  
  3.  import java.io.File;
  4.  import java.util.ArrayList;
  5.  
  6.  /**
  7.   * Created by alimjan on 7/5/2017.
  8.   */
  9.  
  10.  import android.content.Context;
  11.  import android.content.Intent;
  12.  import android.graphics.Bitmap;
  13.          import android.os.Bundle;
  14.          import android.os.Environment;
  15.          import android.support.v7.app.AppCompatActivity;
  16.          import android.util.Log;
  17.          import android.view.View;
  18.          import android.view.View.OnClickListener;
  19.          import android.widget.AdapterView;
  20.          import android.widget.ArrayAdapter;
  21.          import android.widget.Spinner;
  22.          import android.widget.ImageView;
  23.          import android.widget.Toast;
  24.          import android.widget.AdapterView.OnItemSelectedListener;
  25.  
  26.          import com.example.alimjan.hello_world.Utils.FileUtil;
  27.  
  28.  /**
  29.   * Created by ouyangshen on 2016/10/1.
  30.   */
  31.  public class class_4_3_3_1 extends AppCompatActivity implements OnClickListener {
  32.  
  33.      private final static String TAG = "ImageReadActivity";
  34.      private ImageView iv_image;
  35.      private Spinner sp_file;
  36.      private String mPath;
  37.  
  38.      @Override
  39.      protected void onCreate(Bundle savedInstanceState) {
  40.          super.onCreate(savedInstanceState);
  41.          setContentView(R.layout.code_4_3_3_1);
  42.          iv_image = (ImageView) findViewById(R.id.iv_image);
  43.          sp_file = (Spinner) findViewById(R.id.sp_file);
  44.          findViewById(R.id.btn_delete).setOnClickListener(this);
  45.          mPath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/";
  46.          if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED) == true) {
  47.              refreshSpinner();
  48.          } else {
  49.              showToast("未发现已挂载的SD卡，请检查");
  50.          }
  51.      }
  52.  
  53.      private void refreshSpinner() {
  54.          ArrayList<File> fileAlllist = FileUtil.getFileList(mPath, new String[]{".png", ".jpg"});
  55.          if (fileAlllist.size() > 0) {
  56.              fileArray = new String[fileAlllist.size()];
  57.              for (int i=0; i<fileAlllist.size(); i++) {
  58.                  fileArray[i] = fileAlllist.get(i).getName();
  59.              }
  60.              ArrayAdapter<String> typeAdapter = new ArrayAdapter<String>(this,
  61.                      R.layout.item_select, fileArray);
  62.              typeAdapter.setDropDownViewResource(R.layout.item_dropdown);
  63.              sp_file.setPrompt("请选择图片文件");
  64.              sp_file.setAdapter(typeAdapter);
  65.              sp_file.setSelection(0);
  66.              sp_file.setOnItemSelectedListener(new FileSelectedListener());
  67.          } else {
  68.              fileArray = null;
  69.              fileArray = new String[1];
  70.              fileArray[0] = "";
  71.              ArrayAdapter<String> typeAdapter = new ArrayAdapter<String>(this,
  72.                      R.layout.item_select, fileArray);
  73.              sp_file.setPrompt(null);
  74.              sp_file.setAdapter(typeAdapter);
  75.              sp_file.setOnItemSelectedListener(null);
  76.              iv_image.setImageDrawable(null);
  77.          }
  78.      }
  79.  
  80.      private String[] fileArray;
  81.      class FileSelectedListener implements OnItemSelectedListener {
  82.          public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
  83.              String file_path = mPath + fileArray[arg2];
  84.              Bitmap bitmap = FileUtil.openImage(file_path);
  85.              iv_image.setImageBitmap(bitmap);
  86.          }
  87.  
  88.          public void onNothingSelected(AdapterView<?> arg0) {
  89.          }
  90.      }
  91.  
  92.      @Override
  93.      public void onClick(View v) {
  94.          if (v.getId() == R.id.btn_delete) {
  95.              for (int i=0; i<fileArray.length; i++) {
  96.                  String file_path = mPath + fileArray[i];
  97.                  File f = new File(file_path);
  98.                  boolean result = f.delete();
  99.                  if (result != true) {
  100.                      Log.d(TAG, "file_path="+file_path+", delete failed");
  101.                  }
  102.              }
  103.              refreshSpinner();
  104.              showToast("已删除临时目录下的所有图片文件");
  105.          }
  106.      }
  107.  
  108.      private void showToast(String desc) {
  109.          Toast.makeText(this, desc, Toast.LENGTH_SHORT).show();
  110.      }
  111.  
  112.      public static void startHome(Context mcontext){
  113.          Intent intent = new Intent(mcontext,class_4_3_3_1.class);
  114.          mcontext.startActivity(intent);
  115.      }
  116.  
  117.  }
  1.  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  2.      android:layout_width="match_parent"
  3.      android:layout_height="match_parent"
  4.      android:focusable="true"
  5.      android:focusableInTouchMode="true"
  6.      android:orientation="vertical"
  7.      android:padding="10dp" >
  8.  
  9.      <Button
  10.          android:id="@+id/btn_delete"
  11.          android:layout_width="match_parent"
  12.          android:layout_height="wrap_content"
  13.          android:text="删除所有图片文件"
  14.          android:textColor="@color/black"
  15.          android:textSize="20sp" />
  16.  
  17.      <RelativeLayout
  18.          android:layout_width="match_parent"
  19.          android:layout_height="50dp" >
  20.  
  21.          <TextView
  22.              android:id="@+id/tv_file"
  23.              android:layout_width="wrap_content"
  24.              android:layout_height="match_parent"
  25.              android:layout_alignParentLeft="true"
  26.              android:gravity="center"
  27.              android:text="文件名："
  28.              android:textColor="@color/black"
  29.              android:textSize="17sp" />
  30.  
  31.          <Spinner
  32.              android:id="@+id/sp_file"
  33.              android:layout_width="match_parent"
  34.              android:layout_height="match_parent"
  35.              android:layout_toRightOf="@+id/tv_file"
  36.              android:gravity="left|center"
  37.              android:spinnerMode="dialog" />
  38.      </RelativeLayout>
  39.  
  40.      <ImageView
  41.          android:id="@+id/iv_image"
  42.          android:layout_width="match_parent"
  43.          android:layout_height="wrap_content"
  44.          android:scaleType="fitCenter" />
  45.  
  46.  </LinearLayout>

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