Android用代码实现EditText不可编辑_android studio禁止修改edittext-优快云博客

本文介绍如何在Android应用中通过代码方式锁定和解锁EditText组件，使其变得不可编辑。通过设置过滤器来阻止用户输入，从而实现EditText的锁定功能。

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在xml文件中实现EditText不可编辑很简单，只要设置android:editable的值为false即可，可是在代码中却没有setEditable方法；在代码中设置EditText不可编辑只能使用以下代码：

editText.setFilters(new InputFilter[] { new InputFilter() { @Override public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) { return source.length() < 1 ? dest.subSequence(dstart, dend) : ""; } } });

下面是一个例子：

import android.app.Activity; import android.os.Bundle; import android.text.InputFilter; import android.text.Spanned; import android.view.View; import android.widget.Button; import android.widget.EditText; /** * Class which shows how to lock and unlock EditText component * * @author FaYnaSoft Labs */ public class Main extends Activity { private EditText editText; private boolean value = false; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); editText = (EditText) findViewById(R.id.textId); editText.setText("EditText component"); Button b = (Button) findViewById(R.id.btnId); b.setText("Lock/Unlock"); b.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (value) { value = false; } else { value = true; } lockUnlock(value); } }); } /** * Method which locks and unlocks editText component * @param value our boolean value which using in or if operator */ private void lockUnlock(boolean value) { if (value) { editText.setFilters(new InputFilter[] { new InputFilter() { @Override public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) { return source.length() < 1 ? dest.subSequence(dstart, dend) : ""; } } }); } else { editText.setFilters(new InputFilter[] { new InputFilter() { @Override public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) { return null; } } }); } } }