事件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
  
 <TextView 
  android:id="@+id/tv71"
     android:layout_width="fill_parent"
     android:layout_height="wrap_content"
     android:text="@string/hello"/>
  <EditText
   android:id="@+id/et7"
     android:layout_width="fill_parent"
     android:layout_height="wrap_content"
  />  
  <ImageView
   android:id="@+id/iv7"
   android:layout_width="fill_parent"
     android:layout_height="wrap_content"
     android:src="@drawable/a"
  />  
</LinearLayout>

package com.szb;

import java.io.IOException;

import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnLongClickListener; import android.widget.ImageView; import android.widget.TextView;

public class Day07  extends Activity{  private ImageView img;  private TextView tv;    @Override  protected void onCreate(Bundle savedInstanceState) {   // TODO Auto-generated method stub   super.onCreate(savedInstanceState);   setContentView(R.layout.day07);      img = (ImageView) findViewById(R.id.iv7);   tv = (TextView) findViewById(R.id.tv71);   img.setOnLongClickListener(new OnLongClickListener() {        //两个事件:long--> click    //            false --> 不去运行click    //            true  --> 去运行click    @Override    public boolean onLongClick(View v) {     try {      Day07.this.clearWallpaper();      Day07.this.setWallpaper(        Day07.this.getResources().        openRawResource(R.drawable.a));      tv.setText("设置成功");     } catch (IOException e) {      tv.setText("设置失败");      e.printStackTrace();     }     return true;    }   });  } }

package com.szb;

import android.app.Activity; import android.os.Bundle; import android.view.KeyEvent; import android.view.View; import android.view.View.OnKeyListener; import android.widget.EditText; import android.widget.ImageView;

public class Day071  extends Activity{  private EditText et;  private ImageView iv;    @Override  protected void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.day07);      et = (EditText) findViewById(R.id.et7);   iv = (ImageView) findViewById(R.id.iv7);   et.setOnKeyListener(new OnKeyListener() {    @Override    public boolean onKey(View v, int keyCode, KeyEvent event) {     if(event.getAction()==KeyEvent.ACTION_UP){      String str = et.getText().toString();      if(str.matches("\w+[@]\w+[.]\w+")){       iv.setImageResource(R.drawable.a);      }else{       iv.setImageResource(R.drawable.icon);      }     }     return false;    }   });  } }

package com.szb;

import android.app.Activity; import android.os.Bundle; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; import android.widget.ImageView; import android.widget.TextView;

public class Day72  extends Activity{    private TextView tv;  private ImageView iv;  @Override  protected void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.day07);   tv = (TextView) findViewById(R.id.tv71);   iv = (ImageView) findViewById(R.id.iv7);   iv.setOnTouchListener(new OnTouchListener() {    @Override    public boolean onTouch(View v, MotionEvent event) {     tv.setText("("+event.getX()+","+event.getY()+")");     return false;    }   });  } }