Android电池状态监听实例1（上）

文件1:strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="startMonitorBattery">start monitor battery</string>
<string name="stopMonitorBattery">stop monitor battery</string>
    <string name="tip">Please press the button to start monitor battery</string>
    <string name="app_name">BatteryExample</string>
</resources>

文件2：AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.teleca.robin"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".MainActivity"
                  android:label="@string/app_name" 
                  android:configChanges="orientation|keyboardHidden">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
    <uses-sdk android:minSdkVersion="8" />
</manifest> 
文件3：MainActivity.java

package com.teleca.robin;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity {
/** Called when the activity is first created. */
Button btnMonitor;
TextView tipTextView;
boolean blMonitor = false;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btnMonitor = (Button) findViewById(R.id.Button1);
tipTextView = (TextView) findViewById(R.id.tipTextView);
blMonitor = false;
OnClickListener listener = new OnClickListener() {
public void onClick(View v) {
blMonitor=!blMonitor;
if (blMonitor) {
registerReceiver(mBatteryInfoReceiver, new IntentFilter(
Intent.ACTION_BATTERY_CHANGED));
btnMonitor.setText(R.string.stopMonitorBattery);
} else {
unregisterReceiver(mBatteryInfoReceiver);
btnMonitor.setText(R.string.startMonitorBattery);
tipTextView.setText(R.string.tip);
tipTextView.setBackgroundColor(0xFF000000);
tipTextView.invalidate();
}
btnMonitor.invalidate();
}
};
btnMonitor.setOnClickListener(listener);
}
public void onDestroy()
{
if(blMonitor)
{
unregisterReceiver(mBatteryInfoReceiver);
}
super.onDestroy();
}
private BroadcastReceiver mBatteryInfoReceiver = new BroadcastReceiver() {

@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
String action = intent.getAction();
if (Intent.ACTION_BATTERY_CHANGED.equals(action))
{
onBatteryInfo(intent);
}
}
};
StringBuffer strBuffer=new StringBuffer(50);
public void onBatteryInfo(Intent
intent) {
BatteryInfo batteryInfo=new BatteryInfo(intent);
tipTextView.setText(batteryInfo.toString());
tipTextView.setBackgroundResource(batteryInfo.batteryIconId);
tipTextView.invalidate();
}
}