一个监听事件监听多个按钮

    private Button btnWrite;
    private Button btnRead;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btnRead = (Button) findViewById(R.id.btnRead);
        btnWrite = (Button) findViewById(R.id.btnWrite);
        btnRead.setOnClickListener(new ButtonListener());
        btnWrite.setOnClickListener(new ButtonListener());
    }

    private class ButtonListener implements OnClickListener {

        public void onClick(View v) {
            switch (v.getId()) {
            case R.id.btnRead:
                Toast.makeText(MainActivity.this, "读取", Toast.LENGTH_SHORT)
                        .show();
                break;
            case R.id.btnWrite:
                Toast.makeText(MainActivity.this, "写入", Toast.LENGTH_SHORT)
                        .show();
                break;
            default:
                break;
            }
        }

    }