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Android example source code file (BatteryWaster.java)
The BatteryWaster.java Android example source code/* * Copyright (C) 2009 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ 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.battery_waster); 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); log(title + ": level=" + level); } 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; } } } } } } Other Android examples (source code examples)Here is a short list of links related to this Android BatteryWaster.java source code file: |
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