在拖动时在edittext中选择一些文本 [英] select some text in the edittext on drag

问题描述

我想在编辑文本中选择一些文本，但是我不知道该怎么做.

I want to select some text in the edittext,but I do not know how to do it.

我需要这样的方法:当用户触摸屏幕然后拖动并离开屏幕时，将选择被拖动的文本.(我的英语不好，所以不用担心，谢谢)

I need such method: when the user touch the screen then drag and off the screen,the text that dragged will be selected.(my English is poor,so do not mind it,thanks)

textView = (EditText) findViewById(R.id.textvie1);  
InputStream inputStream=getResources().openRawResource(value+0x7f040000);
String string = reader.getString(inputStream);textView.setMovementMethod(new ScrollingMovementMethod());
textView.setText(string);

推荐答案

请参见它使用onTouchListener从运动事件中获取触摸位置，以将光标设置到正确的位置，并告知使用ACTION_MOVE运动事件来选择要拖动的文本.

It uses a onTouchListener to get the touch position from the motion event to set the cursor to the correct spot and tells to use ACTION_MOVE motion event to select text for dragging.

mText = (EditText) findViewById(R.id.editText1);
  OnTouchListener otl = new OnTouchListener() {
  @Override
  public boolean onTouch(View v, MotionEvent event) {
      switch (event.getAction()) {
      case MotionEvent.ACTION_DOWN:
          Layout layout = ((EditText) v).getLayout();
          float x = event.getX() + mText.getScrollX();
          int offset = layout.getOffsetForHorizontal(0, x);
          if(offset>0)
              if(x>layout.getLineMax(0))
                  mText.setSelection(offset);     // touch was at end of text
              else
                  mText.setSelection(offset - 1);
          break;
          }
      return true;
      }
  };
  mText.setOnTouchListener(otl);

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