Android手柄焦点控制

原文地址：http://blog.csdn.net/wcs542882916

public class ActivityFocus extends Activity {

    private Button mBtnCenter;
    private Button mBtnLeft;
    private Button mBtnTop;
    private Button mBtnRight;
    private Button mBtnBottom;

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

        mBtnCenter = (Button) findViewById(R.id.btn_center);
        mBtnLeft = (Button) findViewById(R.id.btn_left);
        mBtnTop = (Button) findViewById(R.id.btn_top);
        mBtnRight = (Button) findViewById(R.id.btn_right);
        mBtnBottom = (Button) findViewById(R.id.btn_bottom);

        // focus =====================================================
        mBtnCenter.setOnKeyListener(new View.OnKeyListener() {
            @Override
            public boolean onKey(View v, int keyCode, KeyEvent event) {
                if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN && event.getAction() == KeyEvent.ACTION_DOWN) {
                    return mBtnBottom.requestFocus();
                } else if (keyCode == KeyEvent.KEYCODE_DPAD_UP && event.getAction() == KeyEvent.ACTION_DOWN) {
                    return mBtnTop.requestFocus();
                } else if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT && event.getAction() == KeyEvent.ACTION_DOWN) {
                    return mBtnLeft.requestFocus();
                } else if (keyCode == KeyEvent.KEYCODE_DPAD_RIGHT && event.getAction() == KeyEvent.ACTION_DOWN) {
                    return mBtnRight.requestFocus();
                }
                return false;
            }
        });
        mBtnLeft.setOnKeyListener(new View.OnKeyListener() {
            @Override
            public boolean onKey(View v, int keyCode, KeyEvent event) {
                if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN && event.getAction() == KeyEvent.ACTION_DOWN) {
                    return mBtnBottom.requestFocus();
                } else if (keyCode == KeyEvent.KEYCODE_DPAD_UP && event.getAction() == KeyEvent.ACTION_DOWN) {
                    return mBtnTop.requestFocus();
                }else if (keyCode == KeyEvent.KEYCODE_DPAD_RIGHT && event.getAction() == KeyEvent.ACTION_DOWN) {
                    return mBtnRight.requestFocus();
                }
                return false;
            }
        });
        mBtnTop.setOnKeyListener(new View.OnKeyListener() {
            @Override
            public boolean onKey(View v, int keyCode, KeyEvent event) {
                if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN && event.getAction() == KeyEvent.ACTION_DOWN) {
                    return mBtnCenter.requestFocus();
                } else if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT && event.getAction() == KeyEvent.ACTION_DOWN) {
                    return mBtnLeft.requestFocus();
                } else if (keyCode == KeyEvent.KEYCODE_DPAD_RIGHT && event.getAction() == KeyEvent.ACTION_DOWN) {
                    return mBtnRight.requestFocus();
                }
                return false;
            }
        });
        mBtnRight.setOnKeyListener(new View.OnKeyListener() {
            @Override
            public boolean onKey(View v, int keyCode, KeyEvent event) {
                if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN && event.getAction() == KeyEvent.ACTION_DOWN) {
                    return mBtnBottom.requestFocus();
                } else if (keyCode == KeyEvent.KEYCODE_DPAD_UP && event.getAction() == KeyEvent.ACTION_DOWN) {
                    return mBtnTop.requestFocus();
                } else if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT && event.getAction() == KeyEvent.ACTION_DOWN) {
                    return mBtnLeft.requestFocus();
                }
                return false;
            }
        });
        mBtnBottom.setOnKeyListener(new View.OnKeyListener() {
            @Override
            public boolean onKey(View v, int keyCode, KeyEvent event) {
                if (keyCode == KeyEvent.KEYCODE_DPAD_UP && event.getAction() == KeyEvent.ACTION_DOWN) {
                    return mBtnTop.requestFocus();
                } else if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT && event.getAction() == KeyEvent.ACTION_DOWN) {
                    return mBtnLeft.requestFocus();
                } else if (keyCode == KeyEvent.KEYCODE_DPAD_RIGHT && event.getAction() == KeyEvent.ACTION_DOWN) {
                    return mBtnRight.requestFocus();
                }
                return false;
            }
        });

        // event ========================================================
        mBtnCenter.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO: 2016/6/11
            }
        });
        mBtnLeft.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO: 2016/6/11
            }
        });
        mBtnTop.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO: 2016/6/11
            }
        });
        mBtnRight.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO: 2016/6/11
            }
        });
        mBtnBottom.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO: 2016/6/11
            }
        });
    }
}