Question

您好我实现了在整个屏幕周围移动textview的代码，它可以在整个屏幕上正常工作但是现在我想在有限的屏幕上实现它

假设有200dp高度和200宽度的相对布局，因为有一个textview和一个imageview

如下所示

        --RelativeLayout
                --ImageView
                --TextView

但是textview不会正常移动它会快速消失，就像它移动更多

下面是我的代码

<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"
tools:context=".MainActivity" >

<RelativeLayout
    android:id="@+id/relativeLayout"
    android:layout_width="200dp"
    android:layout_height="200dp"
    android:layout_centerInParent="true" >

    <ImageView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:src="@drawable/ic_launcher" />

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

和javacode位于

之下

    public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    TextView txtHour = (TextView) findViewById(R.id.txtHour);
    txtHour.setOnTouchListener(new OnTouchListener() {

        public boolean onTouch(View v, MotionEvent event) {
            // TODO Auto-generated method stub
            drag(event, v);
            return true;
        }
    });
}

public void drag(MotionEvent event, View v)
 {

    RelativeLayout relativeLayout = (RelativeLayout)findViewById(R.id.relativeLayout);
     RelativeLayout.LayoutParams params = (android.widget.RelativeLayout.LayoutParams) v.getLayoutParams();

     switch(event.getAction())
     {
        case MotionEvent.ACTION_MOVE:
        {
          params.topMargin = (int)event.getRawY() - (v.getHeight());
          params.leftMargin = (int)event.getRawX() - (v.getWidth()/2);
          v.setLayoutParams(params);
          break;
        }
        case MotionEvent.ACTION_UP:
        {
          params.topMargin = (int)event.getRawY() - (v.getHeight());
          params.leftMargin = (int)event.getRawX() - (v.getWidth()/2);
          v.setLayoutParams(params);
          break;
        }
        case MotionEvent.ACTION_DOWN:
        {
         v.setLayoutParams(params);
         break;
        }
     }
 }
}

当我的手指在那个区域移动时，任何身体能告诉我如何在有限的区域内移动它吗？

在有限的屏幕android周围移动Textview

0 个答案: