焦点事件:OnFocusChangeListener
et.setOnFocusChangeListener(new OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
if(hasFocus){
et.setText("");
}else{
String str=et.getText().toString();
tv.setText(str);
}
}
});
1 package com.hh; 2 3 import android.app.Activity; 4 import android.os.Bundle; 5 import android.view.View; 6 import android.view.View.OnFocusChangeListener; 7 import android.widget.EditText; 8 import android.widget.TextView; 9 10 public class Day061 extends Activity{ 11 private EditText et; 12 private TextView tv; 13 protected void onCreate(Bundle savedInstanceState) { 14 super.onCreate(savedInstanceState); 15 setContentView(R.layout.day06focus); 16 tv=(TextView) findViewById(R.id.tv061); 17 et=(EditText) findViewById(R.id.et061); 18 et.setOnFocusChangeListener(new OnFocusChangeListener() { 19 20 @Override 21 public void onFocusChange(View v, boolean hasFocus) { 22 if(hasFocus){ 23 et.setText(""); 24 }else{ 25 String str=et.getText().toString(); 26 tv.setText(str); 27 } 28 } 29 }); 30 } 31 }
1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 3 android:orientation="vertical" 4 android:layout_width="fill_parent" 5 android:layout_height="fill_parent" 6 > 7 <TextView 8 android:id="@+id/tv061" 9 android:layout_width="fill_parent" 10 android:layout_height="wrap_content" 11 android:background="#FF0000" 12 /> 13 <EditText 14 android:id="@+id/et061" 15 android:layout_width="fill_parent" 16 android:layout_height="wrap_content" 17 /> 18 <EditText 19 android:id="@+id/et062" 20 android:layout_width="fill_parent" 21 android:layout_height="wrap_content" 22 /> 23 </LinearLayout>