安卓開發最簡單的按鍵監聽事件

部分代碼

private static final String TAG = "MainActivity";
private boolean lockLongPressKey, isLongPressKey;//是否長按

 @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        switch (keyCode) {

            case 270:
                Log.e("000000000000000000", "00000000000000000");
                ScanService.openScan();
                return true;


            case 131:
                if (event.getRepeatCount() == 0) {
                    event.startTracking();
                    isLongPressKey = false;
                } else {
                    isLongPressKey = true;
                }
                return true;
            case 132:
                if (event.getRepeatCount() == 0) {
                    event.startTracking();
                    isLongPressKey = false;
                } else {
                    isLongPressKey = true;
                }
                return true;
        }

        return super.onKeyDown(keyCode, event);
    }

    @Override
    public boolean onKeyLongPress(int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub
        switch (keyCode) {
            case 131:
                Log.e("F1", "報警啦");
                lockLongPressKey = true;
                Intent intent = new Intent();
                intent.setAction(Intent.ACTION_CALL);
                intent.setData(Uri.parse("tel:" + "123456789"));
                startActivity(intent);
                return true;
            case 132:
                Log.e("F2", "舉報啦");
                lockLongPressKey = true;
                lockLongPressKey = true;
                Intent intent1 = new Intent();
                intent1.setAction(Intent.ACTION_CALL);
                intent1.setData(Uri.parse("tel:" + "123456789"));
                startActivity(intent1);
                return true;
        }

        return super.onKeyLongPress(keyCode, event);
    }

    public boolean onKeyUp(int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub
        Log.d(TAG, "---->> onKeyDown():keyCode=" + keyCode);
        switch (keyCode) {
            case 131:
                if (lockLongPressKey) {
                    lockLongPressKey = false;
                    return true;
                }
            case 132:
                if (lockLongPressKey) {
                    lockLongPressKey = false;
                    return true;
                }
        }
        return super.onKeyUp(keyCode, event);
    }

    @Override
    protected void onDestroy() {
//    this.unregisterReceiver(scanBroadcastReceiver);
        super.onDestroy();
    }

代碼地址：http://pan.baidu.com/s/1skQWRPN

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