Android四種點擊方式

自定義顯示函數

private void showMessage(String message) {
	Toast.makeText(MainActivity.this, message, Toast.LENGTH_SHORT).show();
}

1. 匿名內部式

Button btn_first = (Button) findViewById(R.id.btn_first); 
btn_first.setOnClickListener(new View.OnClickListener() {
	@Override
	public void onClick(View view) {
    	showMessage("第一種點擊事件");
    }
});

2. 事件監聽事件

 private class MyClickSecondListener implements View.OnClickListener {
        @Override
        public void onClick(View view) {
            showMessage("第二種點擊事件");
        }
    }

3. 由button主動觸發

public void clickBtnFourth(View view) {
	showMessage("第四種點擊");
}

4. 在activity實現onClick方法，再根據點擊的id判斷做出不同的處理

public class Main2Activity extends AppCompatActivity implements View.OnClickListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.click_activity2);
        Button btn_third = (Button) findViewById(R.id.btn_third);
        btn_third.setOnClickListener(this);
    }
    
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.btn_third:
                Toast.makeText(Main2Activity.this, "第三種點擊", Toast.LENGTH_SHORT).show();
                break;
            default:
                Log.e("ID is not found", "未匹配id");
                break;
        }
    }
}