改变亮度Brightness
<uses-permission android:name="android.permission.HARDWARE_TEST"></uses-permission>import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.os.IHardwareService;import android.os.Message;import android.os.RemoteException;import android.os.ServiceManager;import android.widget.TextView;public class Main extends Activity{ private TextView txtStatus;private RefreshHandler mRedrawHandler = new RefreshHandler();class RefreshHandler extends Handler { @Override public void handleMessage(Message msg) { Main.this.updateUI(); } public void sleep(long delayMillis) { this.removeMessages(0); sendMessageDelayed(obtainMessage(0), delayMillis); }};private void updateUI(){ int currentInt = Integer.parseInt((String) txtStatus.getText()) + 20; if(currentInt <= 250){ mRedrawHandler.sleep(1000); setBrightness(currentInt); txtStatus.setText(String.valueOf(currentInt)); }}@Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.main); this.txtStatus = (TextView) this.findViewById(R.id.txtStatus); updateUI();} private void setBrightness(int brightness) { try { IHardwareService hardware = IHardwareService.Stub.asInterface(ServiceManager.getService("hardware")); if (hardware != null) { hardware.setScreenBacklight(brightness); } } catch (RemoteException doe) { } }}
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