【Android】系統音量及螢幕亮度調節

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螢幕亮度調節

/** * 滑動改變亮度,不需要許可權 * * @param percent 亮度百分比,值為0.0----1.0 */private void onBrightnessSlide(float percent) {    if (mBrightness < 0) { // mBrightness是當前螢幕的亮度        mBrightness = getWindow().getAttributes().screenBrightness;        if (mBrightness <= 0.00f)            mBrightness = 0.50f;        if (mBrightness < 0.01f)            mBrightness = 0.01f;        // 顯示        mOperationBg.setImageResource(R.drawable.video_brightness_bg);        mVolumeBrightnessLayout.setVisibility(View.VISIBLE);    }    WindowManager.LayoutParams lpa = getWindow().getAttributes();    lpa.screenBrightness = mBrightness + percent;    if (lpa.screenBrightness > 1.0f)        lpa.screenBrightness = 1.0f;    else if (lpa.screenBrightness < 0.01f)        lpa.screenBrightness = 0.01f;    getWindow().setAttributes(lpa);    ViewGroup.LayoutParams lp = mOperationPercent.getLayoutParams();    //這部分是改變圖片上面的當前亮度的進度的    lp.width = (int) (findViewById(R.id.operation_full).getLayoutParams().width * lpa.screenBrightness);    mOperationPercent.setLayoutParams(lp);}

音量大小

/** * 音量大小,不需要許可權 */public class MainActivity extends Activity {    private static final String TAG = "MainActivity";    private AudioManager mAudioManager;    private int currentVolume;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mAudioManager = (AudioManager) getSystemService(AUDIO_SERVICE);        // 最大音量        int maxVolume = mAudioManager                .getStreamMaxVolume(AudioManager.STREAM_MUSIC);        Log.i(TAG, "最大音量：" + maxVolume);        currentVolume = mAudioManager                .getStreamVolume(AudioManager.STREAM_MUSIC);        Log.i(TAG, "當前音量：" + currentVolume);    }    public void up(View view) {        // 音量增大        // AudioManager.STREAM_SYSTEM        mAudioManager.adjustStreamVolume(AudioManager.STREAM_MUSIC,                AudioManager.ADJUST_RAISE, AudioManager.FX_FOCUS_NAVIGATION_UP);        currentVolume = mAudioManager                .getStreamVolume(AudioManager.STREAM_MUSIC);        Log.i(TAG, "當前音量：" + currentVolume);    }    public void down(View view) {        // 音量減小        mAudioManager.adjustStreamVolume(AudioManager.STREAM_MUSIC,                AudioManager.ADJUST_LOWER, AudioManager.FX_FOCUS_NAVIGATION_UP);        currentVolume = mAudioManager                .getStreamVolume(AudioManager.STREAM_MUSIC);        Log.i(TAG, "當前音量：" + currentVolume);    }}

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【Android】系統音量及螢幕亮度調節