Android笔记之——事件的发生

Java：
package com.example.helloworld;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button button1 = (Button) findViewById(R.id.button1);
        final Button button2 = (Button) findViewById(R.id.button2);
        Button button3 = (Button) findViewById(R.id.button3);
        button3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MainActivity.this,listener2Activity.class);
                startActivity(intent);
            }
        });

        //焦点事件
        button2.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View view, boolean b) {
                System.out.println("焦点按钮被点击..........");
            }
        });

       button1.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View view) {
                System.out.println("长按.....");
                Toast.makeText(MainActivity.this,"按钮被长安了....0.0",Toast.LENGTH_SHORT);
                return true;
            }
        });

        //元事件：action_down,action_move,action_up
        ViewGroup viewGroup = (ViewGroup) findViewById(R.id.activity_main);
        viewGroup.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                int actionType = motionEvent.getAction();
                if (actionType==MotionEvent.ACTION_DOWN){
                    System.out.println("touch 按下");
                }else if (actionType==MotionEvent.ACTION_MOVE){
                    System.out.println("touch 移动");
                    button2.setX(motionEvent.getX());
                    button2.setY(motionEvent.getY());
                }else if (actionType==MotionEvent.ACTION_UP){
                    System.out.println("touch 松开");
                }
                return true;
            }
        });
        //焦点事件
        button2.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View view, boolean b) {
                System.out.println("焦点按钮被点击..........");
            }
        });
        button2.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                //motionEvent:对象记录了事件发生现场情况
                int actionType = motionEvent.getAction();
                if (actionType==MotionEvent.ACTION_DOWN){
                    System.out.println("touch 按下");
                }else if (actionType==MotionEvent.ACTION_MOVE){
                    System.out.println("touch 移动");
                    button2.setX(motionEvent.getX());
                    button2.setY(motionEvent.getY());
                }else if (actionType==MotionEvent.ACTION_UP){
                    System.out.println("touch 松开");
                }

               return true;
            }
        });

        //动态设置
        button1.setOnClickListener(myListener);
        button2.setOnClickListener(myListener);
        button3.setOnClickListener(myListener);
        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                System.out.println("发生点击事件");
                Toast.makeText(MainActivity.this,"被点击了",Toast.LENGTH_SHORT).show();
            }
        });

        //配置方式设置
        android:onClick="button2"
        public void button3(View view){
            Toast.makeText(MainActivity.this,"点击了按钮",Toast.LENGTH_SHORT).show();
        }
//        可复用式

    }

        private View.OnClickListener myListener= new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            switch (view.getId()){
                case R.id.button1:
                    Toast.makeText(MainActivity.this,"button1被点击了",Toast.LENGTH_SHORT).show();
                    break;
                case R.id.button2:
                    Toast.makeText(MainActivity.this,"button2被点击了",Toast.LENGTH_SHORT).show();
                    break;
                case R.id.button3:
                    Toast.makeText(MainActivity.this,"button3被点击了",Toast.LENGTH_SHORT).show();
                    break;
            }
        }
    };
}

XML：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.helloworld.MainActivity">

    <TableLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true">

    </TableLayout>

    <Button
        android:text="Button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/button1"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="38dp"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:onClick="button1"
        />

    <Button
        android:text="Button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/button2"
        android:layout_marginTop="38dp"
        android:id="@+id/button3"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:onClick="button3"
        />

    <Button
        android:text="Button2"
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="31dp"
        android:onClick="button2"
        android:layout_below="@+id/button1"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginLeft="77dp"
        android:layout_marginStart="77dp" />

</RelativeLayout>