android *** Layout 09 CheckBox

照例贴地址，东西都比较简单。

http://android-doc.com/guide/topics/ui/controls/checkbox.html

在xml下新建几个CheckBox，然后在checkbox下注册onClick即可

activity_main.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"    xmlns:android1="http://schemas.android.com/apk/res/android"    android:id="@+id/relative"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="${relativePackage}.${activityClass}" >    <CheckBox        android1:id="@+id/checkBox2"        android1:layout_width="wrap_content"        android1:layout_height="wrap_content"        android1:layout_alignLeft="@+id/checkBox1"        android1:layout_below="@+id/checkBox1"        android1:onClick="onCheckboxClicked"        android1:layout_marginTop="45dp"        android1:text="喵" />    <CheckBox        android1:id="@+id/checkBox1"        android1:layout_width="wrap_content"        android1:layout_height="wrap_content"        android1:layout_alignParentLeft="true"        android1:layout_alignParentTop="true"        android1:layout_marginTop="80dp"        android1:onClick="onCheckboxClicked"        android1:text="汪" />    <CheckBox        android1:id="@+id/checkBox3"        android1:layout_width="wrap_content"        android1:layout_height="wrap_content"        android1:layout_alignParentLeft="true"        android1:layout_below="@+id/checkBox1"        android1:layout_marginTop="14dp"        android1:onClick="onCheckboxClicked"        android1:text="哼" /></RelativeLayout>

MainActivity.java

package com.example.tree;import android.support.v7.app.ActionBarActivity;import android.util.Log;import java.util.ArrayList;import java.util.List;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.view.*;import android.view.View.OnClickListener;import android.view.View.OnKeyListener;import android.widget.ArrayAdapter;import android.widget.AutoCompleteTextView;import android.widget.Button;import android.widget.CheckBox;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends ActionBarActivity implements OnClickListener{private CheckBox check1;private CheckBox check2;private CheckBox check3;private final String TAG="MainActivity";@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Log.i(TAG, "-onCreate-->>");check1=(CheckBox)this.findViewById(R.id.checkBox1);check2=(CheckBox)this.findViewById(R.id.checkBox2);check3=(CheckBox)this.findViewById(R.id.checkBox3);}public void onCheckboxClicked(View v){    boolean checked = ((CheckBox)v).isChecked();    switch(v.getId()){    case R.id.checkBox1:    if(checked)    Toast.makeText(MainActivity.this, "check1 on", 1).show();    else Toast.makeText(MainActivity.this, "check1 off", 1).show();    break;    case R.id.checkBox2:    if(checked)    Toast.makeText(MainActivity.this, "check2 on", 1).show();    else Toast.makeText(MainActivity.this, "check2 off", 1).show();    break;    case R.id.checkBox3:    if(checked)    Toast.makeText(MainActivity.this, "check3 on", 1).show();    else Toast.makeText(MainActivity.this, "check3 off", 1).show();    break;    }    }protected void onStart(){super.onStart();Log.i(TAG, "-onStart-->>");}protected void onRestart(){super.onRestart();Log.i(TAG, "-onRestart-->>");}protected void onResume(){super.onResume();Log.i(TAG, "-onResume-->>");}protected void onPause(){super.onPause();Log.i(TAG, "-onPause-->>");}protected void onStop(){super.onStop();Log.i(TAG, "-onStop-->>");}protected void onDestroy(){super.onDestroy();Log.i(TAG, "-onDestroy-->>");}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// Handle action bar item clicks here. The action bar will// automatically handle clicks on the Home/Up button, so long// as you specify a parent activity in AndroidManifest.xml.int id = item.getItemId();if (id == R.id.action_settings) {return true;}return super.onOptionsItemSelected(item);}@Overridepublic void onClick(View v) {// TODO Auto-generated method stub}}