Question

我有一些TextView和一些EditText，我想从中选择数据的子字符串，用于复制API级别10及以上。我已经为OnLongClickListener实现了ArrayOutOfBoundsException问题，但它（可以理解）抛出public boolean onLongClick(View v) { // TODO Auto-generated method stub //copy longPressedView=v; startSelection=((TextView)v).getSelectionStart(); endSelection=((TextView)v).getSelectionEnd(); Log.d(TAG, "Selection starts at "+startSelection+" and ends at "+endSelection); if(startSelection>endSelection) { startSelection=startSelection+endSelection; endSelection=startSelection-endSelection; startSelection=startSelection-endSelection; Log.d(TAG, "After interchanging positions selection starts at "+startSelection+" and ends at "+endSelection); } mSelectedText=((TextView)v).getText().toString().substring(startSelection, endSelection); mActionMode=startActionMode(actionModeCallback); return true; }：

 java.lang.StringIndexOutOfBoundsException: length=93; regionStart=-1; regionLength=0
 at java.lang.String.startEndAndLength(String.java:583)
 at java.lang.String.substring(String.java:1464)
 at com.example.clipboardtest.MainActivity.onClick(MainActivity.java:139)
 at android.view.View.performClick(View.java:4240)
 at android.view.View$PerformClick.run(View.java:17721)
 at android.os.Handler.handleCallback(Handler.java:730)
 at android.os.Handler.dispatchMessage(Handler.java:92)
 at android.os.Looper.loop(Looper.java:137)
 at android.app.ActivityThread.main(ActivityThread.java:5103)
 at java.lang.reflect.Method.invokeNative(Native Method)
 at java.lang.reflect.Method.invoke(Method.java:525)
 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
 at dalvik.system.NativeStart.main(Native Method)

我已经考虑过实现OnTouchListener，但这只会返回对我来说毫无用处的x和y位置。

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Answer 1

首先在xml中的textview中添加此属性： -

android:textIsSelectable="true"

然后使用此代码： -

    t = (TextView)findViewById(R.id.textView1);
    t.setOnLongClickListener(new View.OnLongClickListener() {

        @Override
        public boolean onLongClick(View v) {

            int start = t.getSelectionStart();
            int end = t.getSelectionEnd();
            if(start == -1 && end == -1){
                return true;
            }
            String mSelectedText=((TextView)v).getText().toString().substring(start, end);
            System.out.println(mSelectedText);

            return false;
        }
    });

Answer 2

OnClickListener怎么样？

text_field.setOnClickListener(new View.OnClickListener()
        {
            public void onClick(View v)
            {
                //-------- Your code goes here
            }
        });

从TextView或EditText中选择Text

2 个答案: