new Selectable TextView in android 3 (API <= 11) Komponente

Question

Nach einer langen und zeitraubenden Suche kann ich keine Komponente finden, die Text in Textview für Android API-Ebene < = 11 auswählen kann. Ich habe diese Komponente geschrieben, die Ihnen behilflich sein können:

 SelectableTextView textView1 = new SelectableTextView(context); 
    textView1.setClickable(false); 
    textView1.setCursorVisible(false); 
    textView1.setOnTouchListener(getOnTextTouch());//new after text select touch 
    textView1.setEnabled(this.selectable); 
    textView1.setTextIsSelectable(this.selectable); 

Upgrade Kann jemand diese Komponente:

public class SelectableTextView extends TextView { 

public static int _SelectedBackgroundColor = 0xffA6D4E1; 
public static int _SelectedTextColor = 0xff000000; 
private OnTouchListener lastOnTouch; 
protected int textOffsetStart; 
protected int textOffsetEnd; 
private OnLongClickListener lastOnLongClick; 
protected boolean longCliked; 
protected boolean isDowned; 
protected int textSelectedEnd; 
protected int textSelectedStart; 
private static SelectableTextView lastInstance; 

public SelectableTextView(Context context) { 
    super(context); 
} 

public void setTextIsSelectable(boolean selectable) { 
    // TODO:ANDROID3 
    // if:androidversion>=3 
    // super.setTextIsSelectable(selectable); 
    // else 
    super.setLongClickable(true); 
    super.setOnLongClickListener(getSelectableLongClick()); 
    super.setOnTouchListener(getSelectableOnTouch()); 
} 

private OnLongClickListener getSelectableLongClick() { 
    return new OnLongClickListener() { 

     @Override 
     public boolean onLongClick(View v) { 
      longCliked = true; 
      if (lastOnLongClick != null) { 
       lastOnLongClick.onLongClick(v); 
      } 
      return true; 
     } 
    }; 
} 

@Override 
public void setOnTouchListener(OnTouchListener l) { 
    super.setOnTouchListener(l); 
    this.lastOnTouch = l; 
} 

@Override 
public void setOnLongClickListener(OnLongClickListener l) { 
    super.setOnLongClickListener(l); 
    this.lastOnLongClick = l; 
} 

private OnTouchListener getSelectableOnTouch() { 
    return new OnTouchListener() { 
     @Override 
     public boolean onTouch(View v, MotionEvent event) { 
      int action = event.getAction(); 

      if (action == MotionEvent.ACTION_DOWN) { 
       if (lastInstance == null) 
        lastInstance = SelectableTextView.this; 
       if (lastInstance != null && lastInstance != SelectableTextView.this) { 
        lastInstance.clean(); 
        lastInstance = SelectableTextView.this; 
       } 

       int offset = getOffset(event); 
       if ((offset < textOffsetEnd && offset > textOffsetStart) 
         || (offset > textOffsetEnd && offset < textOffsetStart)) { 
        if (textOffsetEnd - offset > offset - textOffsetStart) 
         textOffsetStart = textOffsetEnd; 
       } else { 
        clean(); 
        textOffsetStart = offset; 
       } 
       isDowned = true; 
      } else if (isDowned && longCliked && action == MotionEvent.ACTION_MOVE) { 
       selectTextOnMove(event); 
      } else if (action == MotionEvent.ACTION_UP) { 
       isDowned = false; 
       longCliked = false; 
      } 
      if (lastOnTouch != null) 
       lastOnTouch.onTouch(v, event); 
      return false; 
     } 

    }; 
} 

private void selectTextOnMove(MotionEvent event) { 
    int offset = getOffset(event); 
    if (offset != Integer.MIN_VALUE) { 
     String text = getText().toString(); 
     SpannableStringBuilder sb = new SpannableStringBuilder(text); 
     BackgroundColorSpan bgc = new BackgroundColorSpan(_SelectedBackgroundColor); 
     ForegroundColorSpan textColor = new ForegroundColorSpan(_SelectedTextColor); 

     int start = textOffsetStart; 
     textOffsetEnd = offset; 
     int end = offset; 
     if (start > end) { 
      int temp = start; 
      start = end; 
      end = temp; 
     } 
     int[] curectStartEnd = curectStartEnd(text, start, end); 
     start = curectStartEnd[0]; 
     end = curectStartEnd[1]; 
     SelectableTextView.this.textSelectedStart = start; 
     SelectableTextView.this.textSelectedEnd = end; 
     sb.setSpan(bgc, start, end, Spannable.SPAN_INCLUSIVE_INCLUSIVE); 
     sb.setSpan(textColor, start, end, Spannable.SPAN_INCLUSIVE_INCLUSIVE); 

     setText(sb); 
    } 
} 

private int[] curectStartEnd(String text, int start, int end) { 
    int length = text.length(); 

    while (start < length && start > 0 && text.charAt(start) != ' ') { 
     start--; 
    } 
    while (end < length && text.charAt(end) != ' ') { 
     end++; 
    } 
    return new int[] { start, end }; 
} 

private int getOffset(MotionEvent event) { 
    Layout layout = getLayout(); 
    if (layout == null) 
     return Integer.MIN_VALUE; 
    float x = event.getX() + getScrollX(); 
    float y = event.getY() + getScrollY(); 
    int line = layout.getLineForVertical((int) y); 
    int offset = layout.getOffsetForHorizontal(line, x); 
    return offset; 
} 

protected void clean() { 
    if (this.getText() != null) { 
     this.setText(this.getText().toString()); 
     textSelectedStart = 0; 
     textSelectedEnd = 0; 
    } 
} 

@Override 
public int getSelectionStart() { 
    return textSelectedStart; 
} 

@Override 
public int getSelectionEnd() { 
    return textSelectedEnd; 
} 

} 

getOffset der Text, der Benutzer diese Attribute für die Verwendung dieser Komponente gesetzt Berührt gewählte Offset erhalten ?

This is the code in git hub

Answer 1

Auch die folgenden zwei Konstruktoren wegen this

public SelectableTextView(Context context,AttributeSet attrs) 
{ 
    super(context,attrs); 
} 

public SelectableTextView(Context context,AttributeSet attrs,int defStyle) 
{ 
    super(context,attrs,defStyle); 
} 

Ich habe auch die folgende, um den Code:

@SuppressLint("NewApi") 
public void setTextIsSelectable(boolean selectable) { 
    if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.HONEYCOMB) 
     super.setTextIsSelectable(true); 
    else 
    { 
     super.setLongClickable(true); 
     super.setOnLongClickListener(getSelectableLongClick()); 
     super.setOnTouchListener(getSelectableOnTouch()); 
    } 
} 

ich es so verwendet wird, ohne ein OnTouchListener:

txt_copyFrom.setClickable(false); 
txt_copyFrom.setCursorVisible(false); 
txt_copyFrom.setEnabled(true); 
txt_copyFrom.setTextIsSelectable(true); 
txt_copyFrom.setOnLongClickListener(new OnLongClickListener(){ 

    @Override 
    public boolean onLongClick(View v) { 
     int start=txt_copyFrom.getSelectionStart(); 
     int end=txt_copyFrom.getSelectionEnd(); 

     mSelectedText=txt_copyFrom.getText().toString().substring(start, end); 
     Log.d(TAG, "Selected text: "+mSelectedText); 
     return true; 
    } 

}); 

mit dem XML:

<com.example.clipboardtest.SelectableTextView 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:text="Old Buccaneer1The Old Sea-dog at the Admiral BenbowSquire Trelawney, Dr. Livesey, and the rest of these gentlemen having asked me to write down the whole particulars about Treasure Island, from the beginning to the end, keeping nothing back but the bearings of the island, and that only because there is still treasure not yet lifted, I take up my pen in the year of grace 17--and go back to the time when my father kept the Admiral Benbow inn and the brown old seaman with the sabre cut first took up his lodging under our roof." 
    android:id="@+id/txt_copyfrom" 
/>   

Ich glaube, ich habe selbst ein OnTouchListener im OnLongClickListener für die Textview in der Aktivität einzustellen.

Versuchte Logs ganz über dem Platz in SelectableTextView setzen, scheint es nicht zu funktionieren ... Ich finde, dass die LongClickListener genannt wird, aber der Touch ist nicht einmal genannt ...

die OnTouchListener Einstellung innerhalb der OnLongClickListener hat this