Question

是否可以在Action Bar上的单个项目上实现Gesture Listener？我想在搜索项目上实现Gesture监听器，即在滑动搜索按钮上打开一个不同的活动，并且仅点击一次，它会显示默认搜索选项。我是否需要创建自定义操作栏，或者可以使用默认操作栏完成。

Answer 1

以防有人在类似情况下需要帮助。这是解决方案： - 创建自定义操作栏。

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"
android:layout_height="match_parent"
android:layout_gravity="fill_horizontal"
android:focusable="true" >

<FrameLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center_vertical|fill_horizontal" >

    <ImageView
        android:id="@+id/search_query"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="left"
        android:background="@drawable/ic_communities"

        />

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="right|center_vertical"
        android:src="@drawable/ic_launcher" />

</FrameLayout>

创建Gesture监听器类： -

  public class Swipe_listener implements OnTouchListener {


protected final GestureDetector gestureDetector;

@Override
public boolean onTouch(View v, MotionEvent event) {
    // TODO Auto-generated method stub
    return gestureDetector.onTouchEvent(event);
}


public Swipe_listener(Context context) {
    gestureDetector = new GestureDetector(context, new GestureListener());
}

public void onSwipeLeft() {
}

public void onSwipeRight() {
}


private final class GestureListener extends SimpleOnGestureListener {

    private static final int SWIPE_DISTANCE_THRESHOLD = 100;
    private static final int SWIPE_VELOCITY_THRESHOLD = 100;

    @Override
    public boolean onDown(MotionEvent e) {
        return true;
    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
    //  Log.d("HELLOHELLOHELLOGELLO", "Here I am");
        float distanceX = e2.getX() - e1.getX();
        float distanceY = e2.getY() - e1.getY();
        if (Math.abs(distanceX) > Math.abs(distanceY) && Math.abs(distanceX) > SWIPE_DISTANCE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
            if (distanceX > 0)
                onSwipeRight();
            else
                onSwipeLeft();
            return true;
        }
        return false;
    }
}
}

在主要活动中： -

    ActionBar actionBar = getActionBar();
    actionBar.setDisplayHomeAsUpEnabled(true);
    actionBar.setDisplayShowCustomEnabled(true);
    actionBar.setDisplayShowTitleEnabled(false);
    actionBar.setIcon(R.drawable.ic_launcher);

    LayoutInflater inflator = (LayoutInflater) this .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View v = inflator.inflate(R.layout.custom_action_bar, null);


    actionBar.setCustomView(v);

    v.setOnTouchListener(new Swipe_listener(getApplicationContext()){

        public void onSwipeRight() {
           // Toast.makeText(MainActivity.this, "right", Toast.LENGTH_SHORT).show();
            Intent miN=new Intent(MainActivity.this,Prefer_circular.class);
            startActivity(miN);
        }
        public void onSwipeLeft() {
         //   Toast.makeText(MainActivity.this, "left", Toast.LENGTH_SHORT).show();
        }


    public boolean onTouch(View v, MotionEvent event) {
        return gestureDetector.onTouchEvent(event);
    }
    });

来自stackoverflow.com的多个问题的代码

Action Bar Android上的手势监听器

1 个答案: