android.widget.TextView.getViewTreeObserver()方法的使用及代码示例

x33g5p2x  于2022-01-29 转载在 其他  
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本文整理了Java中android.widget.TextView.getViewTreeObserver()方法的一些代码示例，展示了TextView.getViewTreeObserver()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。TextView.getViewTreeObserver()方法的具体详情如下：
包路径：android.widget.TextView
类名称：TextView
方法名：getViewTreeObserver

TextView.getViewTreeObserver介绍

暂无

代码示例

代码示例来源：origin: stackoverflow.com

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);
    }
  }

});

代码示例来源：origin: stackoverflow.com

TextView textView = (TextView)findViewById(R.id.my_textview);
ViewTreeObserver observer = textView.getViewTreeObserver();
observer.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
  @Override
  public void onGlobalLayout() {
    //in here, place the code that requires you to know the dimensions.
    //this will be called as the layout is finished, prior to displaying.
  }
}

代码示例来源：origin: akexorcist/Android-RoundCornerProgressBar

@Override
public void onGlobalLayout() {
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN)
    tvProgress.getViewTreeObserver().removeOnGlobalLayoutListener(this);
  else
    tvProgress.getViewTreeObserver().removeGlobalOnLayoutListener(this);
  drawTextProgressPosition();
}

代码示例来源：origin: stackoverflow.com

final TextView tv = (TextView)findViewById(R.id.venueLabel);
final ViewTreeObserver observer= tv.getViewTreeObserver();
    observer.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
      @Override
      public void onGlobalLayout() {
       tv.getHeight()
       observer.removeGlobalOnLayoutListener(this);
      }
    });

代码示例来源：origin: stackoverflow.com

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);
     }
   });

代码示例来源：origin: akexorcist/Android-RoundCornerProgressBar

@Override
protected void initView() {
  tvProgress = (TextView) findViewById(R.id.tv_progress);
  tvProgress.getViewTreeObserver().addOnGlobalLayoutListener(this);
}

代码示例来源：origin: stackoverflow.com

TextView snippet;
snippet.setText("loren ipsum dolor loren ipsum dolor loren ipsum dolor loren ipsum dolor loren ipsum dolor loren ipsum dolor loren ipsum dolor loren ipsum dolor loren ipsum dolor loren ipsum dolor loren ipsum dolor loren ipsum dolor loren ipsum dolor loren ipsum dolor ")
ViewTreeObserver vto = this.snippet.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

  @Override
  public void onGlobalLayout() {
    ViewTreeObserver obs = snippet.getViewTreeObserver();
    obs.removeGlobalOnLayoutListener(this);
    if (snippet.getLineCount() > 3) {
      int lineEndIndex = snippet.getLayout().getLineEnd(2);
      String text = snippet.getText().subSequence(0, lineEndIndex - 3) + "...";
      snippet.setText(text);
    }
  }
});

代码示例来源：origin: stackoverflow.com

final TextView tv_yourtext = (TextView)findViewById(R.id.text);
 tv_yourtext.setText("A really long text");
 ViewTreeObserver vto = tv_yourtext.getViewTreeObserver();
 vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
   @Override
   public void onGlobalLayout() {
     ViewTreeObserver obs = tv_yourtext.getViewTreeObserver();
     obs.removeGlobalOnLayoutListener(this);
     if(tv_yourtext.getLineCount() > 6){
       Log.d("","Line["+tv_yourtext.getLineCount()+"]"+tv_yourtext.getText());
       int lineEndIndex = tv_yourtext.getLayout().getLineEnd(5);
       String text = tv_yourtext.getText().subSequence(0, lineEndIndex-3)+"...";
       tv_yourtext.setText(text);
       Log.d("","NewText:"+text);
     }
   }
 });

代码示例来源：origin: stackoverflow.com

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);
  }
});

代码示例来源：origin: fython/MaterialStepperView

mTitleText.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
  @Override
  public void onGlobalLayout() {

代码示例来源：origin: stackoverflow.com

setContentView(R.layout.activity_editor);
mTextEditor = (TextView) findViewById(R.id.text_editor);
mTextEditor.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
  @Override
  public void onGlobalLayout() {

代码示例来源：origin: Naoki2015/CircleDemo

@Override
public boolean onPreDraw() {
  // 避免重复监听
  contentText.getViewTreeObserver().removeOnPreDrawListener(this);
  int linCount = contentText.getLineCount();
  if(linCount > showLines){
    if(isExpand){
      contentText.setMaxLines(Integer.MAX_VALUE);
      textPlus.setText("收起");
    }else{
      contentText.setMaxLines(showLines);
      textPlus.setText("全文");
    }
    textPlus.setVisibility(View.VISIBLE);
  }else{
    textPlus.setVisibility(View.GONE);
  }
  //Log.d("onPreDraw", "onPreDraw...");
  //Log.d("onPreDraw", linCount + "");
  return true;
}

代码示例来源：origin: Naoki2015/CircleDemo

public void setText(final CharSequence content){
  contentText.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
    @Override
    public boolean onPreDraw() {
      // 避免重复监听
      contentText.getViewTreeObserver().removeOnPreDrawListener(this);
      int linCount = contentText.getLineCount();
      if(linCount > showLines){
        if(isExpand){
          contentText.setMaxLines(Integer.MAX_VALUE);
          textPlus.setText("收起");
        }else{
          contentText.setMaxLines(showLines);
          textPlus.setText("全文");
        }
        textPlus.setVisibility(View.VISIBLE);
      }else{
        textPlus.setVisibility(View.GONE);
      }
      //Log.d("onPreDraw", "onPreDraw...");
      //Log.d("onPreDraw", linCount + "");
      return true;
    }
  });
  contentText.setText(content);
  contentText.setMovementMethod(new CircleMovementMethod(getResources().getColor(R.color.name_selector_color)));
}

代码示例来源：origin: stackoverflow.com

mTextView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
  @Override
  public void onGlobalLayout() {
      mTextView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
    } else {
      mTextView.getViewTreeObserver().removeOnGlobalLayoutListener(this);

代码示例来源：origin: AAkira/ExpandableLayout

@Override
  public void onGlobalLayout() {
    mExpandLayout.move(mOverlayText.getHeight(), 0, null);
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
      mOverlayText.getViewTreeObserver().removeGlobalOnLayoutListener(mGlobalLayoutListener);
    } else {
      mOverlayText.getViewTreeObserver().removeOnGlobalLayoutListener(mGlobalLayoutListener);
    }
  }
};

代码示例来源：origin: stackoverflow.com

final TextView tv = (TextView) findViewById(R.id.myTextView);
 ViewTreeObserver vto = tv.getViewTreeObserver(); 
 vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() { 
   @Override 
   public void onGlobalLayout() { 
     Toast.makeText(MyActivity.this, tv.getWidth() + " x " + tv.getHeight(), Toast.LENGTH_LONG).show();
     tv.getViewTreeObserver().removeGlobalOnLayoutListener(this);
   } 
 });

代码示例来源：origin: stackoverflow.com

final TextView title = (TextView)findViewById(R.id.text);
   title.setText("A really long text");
   ViewTreeObserver vto = title.getViewTreeObserver();
   vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
     @Override
     public void onGlobalLayout() {
       ViewTreeObserver obs = title.getViewTreeObserver();
       obs.removeGlobalOnLayoutListener(this);
       if(title.getLineCount() > 3){
         Log.d("","Line["+title.getLineCount()+"]"+title.getText());
         int lineEndIndex = title.getLayout().getLineEnd(2);
         String text = title.getText().subSequence(0, lineEndIndex-3)+"...";
         title.setText(text);
         Log.d("","NewText:"+text);
       }
     }
   });

代码示例来源：origin: GeekGhost/Ghost

public void setText(CharSequence charSequence) {
  textContent = charSequence;
  textView.setText(charSequence.toString());
  ViewTreeObserver viewTreeObserver = textView.getViewTreeObserver();
  viewTreeObserver.addOnPreDrawListener(new OnPreDrawListener() {
    @Override
    public boolean onPreDraw() {
      if (!isInitTextView) {
        return true;
      }
      textLines = textView.getLineCount();
      isExpandNeeded = textLines > expandLines;
      isInitTextView = false;
      if (isExpandNeeded) {
        isShrink = true;
        doAnimation(textLines, expandLines, WHAT_ANIMATION_END);
      } else {
        isShrink = false;
        doNotExpand();
      }
      return true;
    }
  });
}

代码示例来源：origin: AAkira/ExpandableLayout

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_example_read_more);
  getSupportActionBar().setTitle(ExampleReadMoreActivity.class.getSimpleName());
  mExpandButton = (Button) findViewById(R.id.expandButton);
  mExpandLayout = (ExpandableRelativeLayout) findViewById(R.id.expandableLayout);
  mOverlayText = (TextView) findViewById(R.id.overlayText);
  mExpandButton.setOnClickListener(this);
  mGlobalLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {
    @Override
    public void onGlobalLayout() {
      mExpandLayout.move(mOverlayText.getHeight(), 0, null);
      if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
        mOverlayText.getViewTreeObserver().removeGlobalOnLayoutListener(mGlobalLayoutListener);
      } else {
        mOverlayText.getViewTreeObserver().removeOnGlobalLayoutListener(mGlobalLayoutListener);
      }
    }
  };
  mOverlayText.getViewTreeObserver().addOnGlobalLayoutListener(mGlobalLayoutListener);
}

代码示例来源：origin: githubwing/WingUE

@Override public void onGlobalLayout() {
  mSearchBGTxt.getViewTreeObserver().removeOnGlobalLayoutListener(this);
  performEnterAnimation();
 }
});

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