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我想在单击按钮时在编辑文本中显示芯片。这是我尝试过的：

ChipsMultiAutoCompleteTextview.java （这个类有它的构造函数和这个方法来在用户单击按钮时将名称设置为芯片。）

    public void setChips(String chip_title) {

    if (!chip_title.equals("")) {
        SpannableStringBuilder ssb = new SpannableStringBuilder(getText());


        int x = 0;

        LayoutInflater lf = (LayoutInflater) getContext().getSystemService(
                Activity.LAYOUT_INFLATER_SERVICE);

        TextView textView = (TextView) lf.inflate(R.layout.chips_edittext,
                null);

        textView.setText(chip_title); // set text

        int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
        textView.measure(spec, spec);
        textView.layout(0, 0, textView.getMeasuredWidth(),
                textView.getMeasuredHeight());

        Bitmap b = Bitmap.createBitmap(textView.getWidth(),
                textView.getHeight(), Bitmap.Config.ARGB_8888);

        Canvas canvas = new Canvas(b);
        canvas.translate(-textView.getScrollX(), -textView.getScrollY());

        textView.draw(canvas);
        textView.setDrawingCacheEnabled(true);

        Bitmap cacheBmp = textView.getDrawingCache();
        Bitmap viewBmp = cacheBmp.copy(Bitmap.Config.ARGB_8888, true);

        textView.destroyDrawingCache(); // destory drawable
        // create bitmap drawable for imagespan

        BitmapDrawable bmpDrawable = new BitmapDrawable(viewBmp);
        bmpDrawable.setBounds(0, 0, bmpDrawable.getIntrinsicWidth(),
                bmpDrawable.getIntrinsicHeight());

        Log.d("startx", "" + x);
        Log.d("end", "" + (x + chip_title.length()));

        // create and set imagespan
        ssb.setSpan(new ImageSpan(bmpDrawable), x, x + chip_title.length(),
                Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

        x = x + chip_title.length() + 1;
        setText(ssb);

        // move cursor to last
        setSelection(getText().length());

    }
}

MainActivity.java

public class MainActivity extends Activity implements OnClickListener {

ChipsMultiAutoCompleteTextview mu;

Button btn1, btn2, btn3;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mu = (ChipsMultiAutoCompleteTextview) findViewById(R.id.multiAutoCompleteTextView1);

    btn1 = (Button) findViewById(R.id.but1);

    btn1.setOnClickListener(this);

}

@Override
public void onClick(View v) {

    switch (v.getId()) {
    case R.id.but1:

        String str1 = btn1.getText().toString();

        Log.d("Button name", str1);

        ChipsMultiAutoCompleteTextview chip1 = new ChipsMultiAutoCompleteTextview(
                this);
        chip1.setChips(str1);
        break;

    }

}

}

该程序应在单击按钮时在编辑文本中生成一个芯片。但是，我收到此错误。logcat详细信息如下：

04-12 10:34:01.730: E/AndroidRuntime(23041): FATAL EXCEPTION: main
04-12 10:34:01.730: E/AndroidRuntime(23041): java.lang.IndexOutOfBoundsException: setSpan (0 ... 4) ends beyond length 0
04-12 10:34:01.730: E/AndroidRuntime(23041):    at android.text.SpannableStringBuilder.checkRange(SpannableStringBuilder.java:1016)
04-12 10:34:01.730: E/AndroidRuntime(23041):    at android.text.SpannableStringBuilder.setSpan(SpannableStringBuilder.java:592)
04-12 10:34:01.730: E/AndroidRuntime(23041):    at android.text.SpannableStringBuilder.setSpan(SpannableStringBuilder.java:588)
04-12 10:34:01.730: E/AndroidRuntime(23041):    at com.androidchipps.ChipsMultiAutoCompleteTextview.setChips(ChipsMultiAutoCompleteTextview.java:109)
04-12 10:34:01.730: E/AndroidRuntime(23041):    at com.androidchipps.MainActivity.onClick(MainActivity.java:65)
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