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e69da5e6ba9062616964757a686964616f31333262373937这个是获取电量的android DEMO：

package com.android.batterywaster;

import android.app.Activity;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.content.IntentFilter;

import android.os.BatteryManager;

import android.os.Bundle;

import android.os.PowerManager;

import android.view.View;

import android.widget.CheckBox;

import android.widget.TextView;

import java.text.DateFormat;

import java.util.Date;

/**

* So you thought sync used up your battery life.

*/

public class BatteryWaster extends Activity {

TextView mLog;

DateFormat mDateFormat;

IntentFilter mFilter;

PowerManager.WakeLock mWakeLock;

SpinThread mThread;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

// Set the layout for this activity. You can find it

// in res/layout/hello_activity.xml

setContentView(R.layout.main);

findViewById(R.id.checkbox).setOnClickListener(mClickListener);

mLog = (TextView)findViewById(R.id.log);

mDateFormat = DateFormat.getInstance();

mFilter = new IntentFilter();

mFilter.addAction(Intent.ACTION_BATTERY_CHANGED);

mFilter.addAction(Intent.ACTION_BATTERY_LOW);

mFilter.addAction(Intent.ACTION_BATTERY_OKAY);

mFilter.addAction(Intent.ACTION_POWER_CONNECTED);

PowerManager pm = (PowerManager)getSystemService(POWER_SERVICE);

mWakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, "BatteryWaster");

mWakeLock.setReferenceCounted(false);

}

@Override

public void onPause() {

stopRunning();

}

View.OnClickListener mClickListener = new View.OnClickListener() {

public void onClick(View v) {

CheckBox checkbox = (CheckBox)v;

if (checkbox.isChecked()) {

startRunning();

} else {

stopRunning();

}

}

};

void startRunning() {

log("Start");

registerReceiver(mReceiver, mFilter);

mWakeLock.acquire();

if (mThread == null) {

mThread = new SpinThread();

mThread.start();

}

}

void stopRunning() {

log("Stop");

unregisterReceiver(mReceiver);

mWakeLock.release();

if (mThread != null) {

mThread.quit();

mThread = null;

}

}

void log(String s) {

mLog.setText(mLog.getText() + "\n" + mDateFormat.format(new Date()) + ": " + s);

}

BroadcastReceiver mReceiver = new BroadcastReceiver() {

public void onReceive(Context context, Intent intent) {

String action = intent.getAction();

String title = action;

int index = title.lastIndexOf('.');

if (index >= 0) {

title = title.substring(index + 1);

}

if (Intent.ACTION_BATTERY_CHANGED.equals(action)) {

int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);

int icon = intent.getIntExtra(BatteryManager.EXTRA_ICON_SMALL,-1);

log(title + ": level=" + level + "\n" + "icon:" + icon);

} else {

log(title);

}

}

};

class SpinThread extends Thread {

private boolean mStop;

public void quit() {

synchronized (this) {

mStop = true;

}

}

public void run() {

while (true) {

synchronized (this) {

if (mStop) {

return;

}

}

}

}

}

}

这个是layout：

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical"

>

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_marginLeft="25dp"

android:layout_marginTop="25dp"

android:textSize="18sp"

android:textColor="#ffffffff"

android:text="@string/waste_away"

/>

android:layout_width="fill_parent"

android:layout_height="0px"

android:layout_weight="1"

>

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_marginTop="25dp"

android:textSize="12sp"

android:textColor="#ffffffff"

/>

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