Android複数ボタンプレス

Question

複数のキーを同時に押すと（パワーと音量キーを使ってリカバリやダウンロードモードを起動するときなど）、アンドロイドアプリケーションで新しいアクティビティを開始する方法を教えてください。

@Override 
    public boolean onKeyDown(int keyCode, KeyEvent event) 
    { 
     if ((keyCode == KeyEvent.KEYCODE_VOLUME_DOWN)) 
     { 
      Intent intent = new Intent(this, SettingsActivity.class); 
      startActivity(intent); 
     } 
     return true; 
    } 

Answer 1

次の解決方法を試してみて、それがテストされ、それが動作します！

public class MainActivity extends AppCompatActivity { 
    private boolean isVolumeUpPressed = false; 
    private boolean isVolumeDownPressed = false; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
    } 

    @Override 
    public boolean onKeyDown(final int keyCode, final KeyEvent event) { 
     if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) { 
      this.isVolumeDownPressed = true; 
     } else if (keyCode == KeyEvent.KEYCODE_VOLUME_UP) { 
      this.isVolumeUpPressed = true; 
     } 
     if (this.isVolumeUpPressed && this.isVolumeDownPressed) { 
      final Intent intent = new Intent(this, SettingsActivity.class); 
      startActivity(intent); 
     } 
     return super.onKeyUp(keyCode, event); 
    } 

    @Override 
    public boolean onKeyUp(final int keyCode, final KeyEvent event) { 
     if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) { 
      this.isVolumeDownPressed = false; 
     } else if (keyCode == KeyEvent.KEYCODE_VOLUME_UP) { 
      this.isVolumeUpPressed = false; 
     } 
     return super.onKeyUp(keyCode, event); 
    } 
} 

Answer 2

if ((keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) && (keyCode == KeyEvent.KEYCODE_VOLUME_UP)) {