Android EditText使用详解-包含很多教程上看不到的功能演示

package com.flysnow; import android.app.Activity; import android.os.Bundle; import android.text.Editable; import android.text.Selection; import android.view.KeyEvent; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; import android.widget.TextView.OnEditorActionListener; /** * EditText演示 * @author 飞雪无情 * @since 2010-11-29 */ public class HelloEditText extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); final EditText editText=(EditText)findViewById(R.id.edit_text); //监听回车键 editText.setOnEditorActionListener(new OnEditorActionListener() { @Override public boolean onEditorAction(TextView v, int actionId, KeyEvent event) { Toast.makeText(HelloEditText.this, String.valueOf(actionId), Toast.LENGTH_SHORT).show(); return false; } }); //获取EditText文本 Button getValue=(Button)findViewById(R.id.btn_get_value); getValue.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Toast.makeText(HelloEditText.this, editText.getText().toString(), Toast.LENGTH_SHORT).show(); } }); //让EditText全选 Button all=(Button)findViewById(R.id.btn_all); all.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { editText.selectAll(); } }); //从第2个字符开始选择EditText文本 Button select=(Button)findViewById(R.id.btn_select); select.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Editable editable=editText.getText(); Selection.setSelection(editable, 1,editable.length()); } }); //获取选中的文本 Button getSelect=(Button)findViewById(R.id.btn_get_select); getSelect.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { int start=editText.getSelectionStart(); int end=editText.getSelectionEnd(); CharSequence selectText=editText.getText().subSequence(start, end); Toast.makeText(HelloEditText.this, selectText, Toast.LENGTH_SHORT).show(); } }); } /** * 交换两个索引 * @param start 开始索引 * @param end 结束索引 */ protected void switchIndex(int start, int end) { int temp=start; start=end; end=temp; } }