Question

我有这个简单的代码：

public class MainActivity extends ActionBarActivity {

public TextView textView;
StringBuilder builder = new StringBuilder();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    textView = (TextView) findViewById(R.id.touch_textView);
    textView.setText("Hello");


    textView.setOnTouchListener(new View.OnTouchListener() {

        String TAG = "onTouchListener";

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            Log.d(TAG,"Triggered");

            // TODO Auto-generated method stub
            switch(event.getAction())
            {
            case MotionEvent.ACTION_DOWN:
                Log.d(TAG,"Down");
                builder.append("down, ");
                break;
            case MotionEvent.ACTION_MOVE:
                builder.append("move, ");
                Log.d(TAG,"Move");
                break;
            case MotionEvent.ACTION_CANCEL:
                builder.append("cancel, ");
                Log.d(TAG,"Cancel");
                break;
            case MotionEvent.ACTION_UP:
                builder.append("up, ");
                Log.d(TAG,"Up");
                break;
            }

            builder.append(event.getX());
            builder.append(", ");
            builder.append(event.getY());
            String text = builder.toString();
            Log.d("TouchTest", text);
            textView.setText(text);         
            return true;
        }
    });
}
}

......这个简单的布局：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.touchhandling.MainActivity">

<TextView
    android:id="@+id/touch_textView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>
</RelativeLayout>

我的问题是我的TextView的onTouchListener没有收到触摸事件，而是我在Logcat中看到了这个：

ViewRoot的触摸事件：ACTION_UP

似乎我的FrameLayout正在窃取触摸事件。我怎样才能做到这一点？孩子应该先参加活动吗？

谢谢，任何提示都表示赞赏！

Answer 1

尝试textView.setClickable(true)。

Answer 2

public class TestMainActivity extends ActionBarActivity
{
    public TextView textView;
    StringBuilder builder = new StringBuilder();
    Context context;

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

        context = this;
        if (savedInstanceState == null)
        {
            getSupportFragmentManager().beginTransaction().add(R.id.container, new PlaceholderFragment()).commit();
        }

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {

        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item)
    {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings)
        {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment
    {
        public TextView textView;
        StringBuilder builder = new StringBuilder();
        Context context;

        public PlaceholderFragment()
        {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
        {

            context = this.getActivity();
            View rootView = inflater.inflate(R.layout.fragment_main, container, false);

            textView = (TextView) rootView.findViewById(R.id.touch_textView);
            textView.setText("Hello");

            // context = this;
            textView.setOnTouchListener(new View.OnTouchListener()
            {

                String TAG = "onTouchListener";

                @Override
                public boolean onTouch(View v, MotionEvent event)
                {
                    Log.d(TAG, "Triggered");

                    Toast.makeText(context, "Triggered textView", "Triggered textView".length()).show();
                    // TODO Auto-generated method stub
                    switch (event.getAction())
                    {
                        case MotionEvent.ACTION_DOWN:
                            Log.d(TAG, "Down");
                            builder.append("down, ");

                            break;
                        case MotionEvent.ACTION_MOVE:
                            builder.append("move, ");
                            Log.d(TAG, "Move");
                            break;
                        case MotionEvent.ACTION_CANCEL:
                            builder.append("cancel, ");
                            Log.d(TAG, "Cancel");
                            break;
                        case MotionEvent.ACTION_UP:
                            builder.append("up, ");
                            Log.d(TAG, "Up");
                            break;
                    }

                    builder.append(event.getX());
                    builder.append(", ");
                    builder.append(event.getY());
                    String text = builder.toString();
                    Log.d("TouchTest", text);
                    textView.setText(text);
                    return true;
                }
            });

            return rootView;
        }
    }

}

和fragment_layout.xml：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/touch_parent"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.stacktest.MainActivity$PlaceholderFragment" >

    <TextView
        android:id="@+id/touch_textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

</RelativeLayout>

FrameLayout窃取TextView的触摸事件

2 个答案: