Android-我怎样才能显示在TextView的文本选择？ [英] Android- How can I show text selection on textview?

问题描述

我在执行一个EPUB阅读应用程序，我现在用的TextView用于显示EPUB文本。我想从TextView中选择文本时，对TextView的用户长presses，然后做的TextView像亮点等选定的文本多个操作方法。 所以，我怎么能显示这些光标用户无论用户要选择文本。

I am implementing a epub reading app where I am using textview for showing text of epub. I want to select text from textview when user long presses on textview and then do multiple operations on selected text of textview like highlight etc.. So, How can I show those cursors to user to select text whatever user wants.

*我不想使用的EditText，并使它看起来像TextView中。可能是压倒一切的TextView是prefered。

*I dont want to use EditText and make it look like textview. May be overriding textview is prefered.

*我附上截图来解释什么，我找换

*I have attached screenshot to explain what I am looking for-

推荐答案

这是问很久以前，当我有这个问题，我自己也是如此。我做了一个可选的TextView我自己对我自己的应用程序玉读者。我已经主持了解决方案，以GitHub上。 （在code的关系BitBucket上的应用程序，但它更完整和抛光。）

This is asked long time ago, when I had this problem myself as well. I made a Selectable TextView myself for my own app Jade Reader. I've hosted the solution to GitHub. (The code at BitBucket ties to the application, but it's more complete and polished.)

可选择的TextView（在GitHub上）

玉石器（上BitBucket上）

使用下面的code将使您的TextView的选择。

Using the following code will make your TextView selectable.

package com.zyz.mobile.example;

import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;

public class MainActivity extends Activity {

    private SelectableTextView mTextView;
    private int mTouchX;
    private int mTouchY;
    private final static int DEFAULT_SELECTION_LEN = 5;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        // make sure the TextView's BufferType is Spannable, see the main.xml
        mTextView = (SelectableTextView) findViewById(R.id.main_text);
        mTextView.setDefaultSelectionColor(0x40FF00FF);


        mTextView.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                showSelectionCursors(mTouchX, mTouchY);
                return true;
            }
        });
        mTextView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mTextView.hideCursor();
            }
        });
        mTextView.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                mTouchX = (int) event.getX();
                mTouchY = (int) event.getY();
                return false;
            }
        });
    }

    private void showSelectionCursors(int x, int y) {
        int start = mTextView.getPreciseOffset(x, y);

        if (start > -1) {
            int end = start + DEFAULT_SELECTION_LEN;
            if (end >= mTextView.getText().length()) {
                end = mTextView.getText().length() - 1;
            }
            mTextView.showSelectionControls(start, end);
        }
    }
}

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