Android 开发使用PopupWindow实现弹出警告框的复用类示例
本文实例讲述了Android 开发使用PopupWindow实现弹出警告框的复用类。分享给大家供大家参考,具体如下:
Android开发中相信下图所示界面大家都不陌生,该种弹出框的使用频率也是极高的,所以我专门谢了个类用于方便的弹出该界面。并把确定或取消后的逻辑通过抽象方法的方式让用户自己实现,大大提高了开发效率。下面是该类:
package com.***.popupwindow;import ******;public abstract class MyPopupWindow { private PopupWindow popupWindow; private Activity context; private String content; private String positiveWord = '确定'; private String negativeWord = '取消'; /** * 构造函数 * * @param context */ public MyPopupWindow(Activity context) { this.context = context; } /** * 显示警示框 */ public void show() { View popView = View.inflate(context, R.layout.popup, null); popupWindow = new PopupWindow(context); popupWindow.setHeight(400); popupWindow.setWidth(700); popupWindow.setOutsideTouchable(true); popupWindow.setFocusable(true); popupWindow.setContentView(popView); popupWindow.showAtLocation(context.getWindow().getDecorView(), Gravity.CENTER, 0, 0); TextView tv_pop_text = (TextView) popView.findViewById(R.id.tv_pop_text); tv_pop_text.setText(content); Button bt_pop_sure = (Button) popView.findViewById(R.id.bt_pop_sure); bt_pop_sure.setText(positiveWord); bt_pop_sure.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) {sureClick(); } }); Button bt_pop_cancel = (Button) popView.findViewById(R.id.bt_pop_cancel); bt_pop_cancel.setText(negativeWord); bt_pop_cancel.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) {cancelClick(); } }); } /** * 确定键按下后执行 */ public abstract void sureClick(); /** * 取消键按下后执行 */ public abstract void cancelClick(); /** * 为警示设置警示内容 * * @param content */ public void setContent(String content) { this.content = content; } /** * 设置确定键文字 * * @param positiveWord */ public void setPositiveWord(String positiveWord) { this.positiveWord = positiveWord; } /** * 设置取消键文字 * * @param negativeWord */ public void setNegativeWord(String negativeWord) { this.negativeWord = negativeWord; } /** * 手动取消警示框 */ public void dismiss() { popupWindow.dismiss(); }}
其中弹出框用到的布局popup.xml代码如下:
<?xml version='1.0' encoding='utf-8'?><LinearLayout xmlns:android='http://schemas.android.com/apk/res/android' android:layout_width='match_parent' android:layout_height='match_parent' android:background='@android:color/white' android:orientation='vertical'> <TextView android: android:layout_width='match_parent' android:layout_height='wrap_content' android:layout_weight='1' android:gravity='center'/> <TextView android:layout_width='match_parent' android:layout_height='1px' android:background='@android:color/darker_gray'/> <LinearLayout android:layout_width='match_parent' android:layout_height='wrap_content' android:orientation='horizontal'> <Button android: android:layout_width='wrap_content' android:layout_height='wrap_content' android:background='@android:color/transparent' android:layout_weight='1'/> <TextView android:layout_width='1px' android:layout_height='match_parent' android:background='@android:color/darker_gray'/> <Button android: android:layout_width='wrap_content' android:layout_height='wrap_content' android:background='@android:color/transparent' android:layout_weight='1'/> </LinearLayout></LinearLayout>
下面简单的使用一下:在界面放一个按钮,按钮点击后弹出警告框。代码如下:
package com.toprs.popupwindow;import android.graphics.Color;import android.graphics.drawable.ColorDrawable;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.AttributeSet;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ArrayAdapter;import android.widget.Button;import android.widget.ListView;import android.widget.PopupWindow;import android.widget.SeekBar;import android.widget.Toast;public class MainActivity extends AppCompatActivity { private PopupWindow popupWindow; private Button button; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); button = (Button) findViewById(R.id.button); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) {MyPopupWindow myPopupWindow = new MyPopupWindow(MainActivity.this) { @Override public void sureClick() { Toast.makeText(MainActivity.this, '确定', Toast.LENGTH_SHORT).show(); } @Override public void cancelClick() { Toast.makeText(MainActivity.this, '取消', Toast.LENGTH_SHORT).show(); }};myPopupWindow.setContent('确定退出?');myPopupWindow.show(); } }); }}
即如下效果:
So,以后使用只需要简单调用几句代码就好了!
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