android搜索框布局文件,自定义超简单SearchView搜索框-优快云博客

该博客主要展示了如何在Android应用中实现一个搜索功能，包括使用EditText进行文本输入，监听文本变化以显示或隐藏清空搜索框的按钮，以及设置按钮点击事件清除搜索内容。此外，还详细说明了EditText的onKeyListener用于监听键盘回车事件，展示搜索结果的 Toast 提示。

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先看效果图

Java代码：

import android.os.Bundle;

import android.text.Editable;

import android.text.TextWatcher;

import android.view.KeyEvent;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.View.OnKeyListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.LinearLayout;

import android.widget.Toast;

import android.app.Activity;

public class MainActivity extends Activity {

private EditText mEtSearch = null;// 输入搜索内容

private Button mBtnClearSearchText = null;// 清空搜索信息的按钮

private LinearLayout mLayoutClearSearchText = null;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

mEtSearch = (EditText) findViewById(R.id.et_search);

mBtnClearSearchText = (Button) findViewById(R.id.btn_clear_search_text);

mLayoutClearSearchText = (LinearLayout) findViewById(R.id.layout_clear_search_text);

mEtSearch.addTextChangedListener(new TextWatcher() {

@Override

public void onTextChanged(CharSequence s, int start, int before,

int count) {

}

@Override

public void beforeTextChanged(CharSequence s, int start, int count,

int after) {

}

@Override

public void afterTextChanged(Editable s) {

int textLength = mEtSearch.getText().length();

if (textLength > 0) {

mLayoutClearSearchText.setVisibility(View.VISIBLE);

} else {

mLayoutClearSearchText.setVisibility(View.GONE);

}

});

mBtnClearSearchText.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

mEtSearch.setText("");

mLayoutClearSearchText.setVisibility(View.GONE);

}

});

mEtSearch.setOnKeyListener(new OnKeyListener() {

@Override

public boolean onKey(View arg0, int keyCode, KeyEvent event) {

if (keyCode == KeyEvent.KEYCODE_ENTER) {

Toast.makeText(MainActivity.this,

mEtSearch.getText().toString().trim(),

Toast.LENGTH_LONG).show();

}

return false;

}

});

}

布局文件

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical">

android:layout_width="fill_parent"

android:layout_height="50dp"

android:layout_marginTop="5dp"

android:layout_marginLeft="20dp"

android:layout_marginRight="12dp"

android:background="@drawable/shape_search_app_bg_yj"

android:orientation="horizontal">

android:id="@+id/et_search"

android:layout_weight="4"

android:layout_width="0dp"

android:layout_height="fill_parent"

android:imeOptions="actionSearch"

android:layout_marginLeft="10dp"

android:textColor="#0e0e0e"

android:textSize="17sp"

android:singleLine="true"

android:hint="搜索"

android:textColorHint="#b0c6ce"

android:gravity="center_vertical"

android:drawableLeft="@drawable/ic_search_app_left"

android:background="@null"/>

android:id="@+id/layout_clear_search_text"

android:layout_weight="0.5"

android:layout_width="0dp"

android:layout_height="fill_parent"

android:visibility="gone"

android:orientation="horizontal">

android:id="@+id/btn_clear_search_text"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="right|center_vertical"

android:background="@drawable/selector_btn_search_clear_text_right"