Question

我正在onTouchListener中实施MainActivity并将OnTouchListener归因于Textview tv，但是在按下屏幕时不会弹出任何消息。

MainActivity

public class MainActivity extends Activity implements View.OnTouchListener
{
    TextView tv;    
    @Override
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        tv=(TextView)findViewById(R.id.tv);
        tv.setOnTouchListener(this);
        tv.setText(R.string.hello);
    }

    public boolean onTouch(View v,MotionEvent event)
    {
        Toast.makeText(this,"onTouch",Toast.LENGTH_LONG).show();
        return true;
    }
}

Answer 1

如果同意

，请尝试接受

 tv.setOnTouchListener(new CustomTouchListener());

public class CustomTouchListener implements View.OnTouchListener {     
    public boolean onTouch(View view, MotionEvent motionEvent) {
    switch(motionEvent.getAction()){            
            case MotionEvent.ACTION_DOWN:
                // Action you you want on finger down.
  Toast.makeText(this,"onTouch",Toast.LENGTH_LONG).show();
                break;          
            case MotionEvent.ACTION_CANCEL:             
            case MotionEvent.ACTION_UP:
                // Action you you want on finger up
                break;
    } 
        return false;   
    } 
}

Answer 2

TextView lastTV= (TextView) findViewById(R.id.lastTvValue);

lastTV.setOnTouchListener(new View.OnTouchListener() {

            @SuppressLint("ClickableViewAccessibility")
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                // TODO Auto-generated method stub
                if (event.getAction() == MotionEvent.ACTION_DOWN) {
                    //do stuff here
                    }

                Log.i("click text", "kakak");
                return false;
            }
        });

Answer 3

嗯，onTouchListener（）有时只接收一些用户触摸输入。你能把它变成一个onClickListener（）并看看行为是否解决了？

我编译并运行了你的代码，顺便说一句，它运行正常。你有onTouch（）打印一个Log.v（）消息，并确保你的onTouch（）被调用？

Answer 4

你必须@override onTouch方法，尝试删除实现onTouchListener并再次写入导入正确的一个，直到你写

它才会工作

@Override
public boolean onTouch(View v,MotionEvent event)
{
    Toast.makeText(this,"onTouch",Toast.LENGTH_LONG).show();
    return true;
}

为TextView实现onTouchListener

4 个答案: