[android] 뷰의 치수를 검색하는 방법은 무엇입니까?

보기로 구성되어 TableLayout, TableRow and TextView있습니다. 그리드처럼 보이기를 원합니다. 이 그리드의 높이와 너비를 가져와야합니다. 방법 getHeight()과 getWidth()항상 내가이 XML 버전을 사용할 때 동적으로도 그리드를 포맷 할 때 발생 0으로 돌아갑니다.

뷰의 치수를 검색하는 방법은 무엇입니까?

결과를 확인하기 위해 디버그에서 사용한 테스트 프로그램은 다음과 같습니다.

import android.app.Activity;
import android.os.Bundle;
import android.widget.TableLayout;
import android.widget.TextView;

public class appwig extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.maindemo);  //<- includes the grid called "board"
      int vh = 0;
      int vw = 0;

      //Test-1 used the xml layout (which is displayed on the screen):
      TableLayout tl = (TableLayout) findViewById(R.id.board);
      tl = (TableLayout) findViewById(R.id.board);
      vh = tl.getHeight();     //<- getHeight returned 0, Why?  
      vw = tl.getWidth();     //<- getWidth returned 0, Why?   

      //Test-2 used a simple dynamically generated view:        
      TextView tv = new TextView(this);
      tv.setHeight(20);
      tv.setWidth(20);
      vh = tv.getHeight();    //<- getHeight returned 0, Why?       
      vw = tv.getWidth();    //<- getWidth returned 0, Why?

    } //eof method
} //eof class

답변

final TextView tv = (TextView)findViewById(R.id.image_test);
ViewTreeObserver vto = tv.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

    @Override
    public void onGlobalLayout() {
        LayerDrawable ld = (LayerDrawable)tv.getBackground();
        ld.setLayerInset(1, 0, tv.getHeight() / 2, 0, 0);
        ViewTreeObserver obs = tv.getViewTreeObserver();

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
            obs.removeOnGlobalLayoutListener(this);
        } else {
            obs.removeGlobalOnLayoutListener(this);
        }
    }

});

@Override
public void onWindowFocusChanged (boolean hasFocus) {
        // the height will be set at this point
        int height = myEverySoTallView.getMeasuredHeight();
}

yourView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            if (!mMeasured) {
                // Here your view is already layed out and measured for the first time
                mMeasured = true; // Some optional flag to mark, that we already got the sizes
            }
        }
    });

post(new Runnable() {
    @Override
    public void run() {
        Log.d(TAG, "width " + MyView.this.getMeasuredWidth());
        }
    });

view.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
    @Override
    public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {
        // Make changes
    }
});