Android 開發使用PopupWindow實現彈出警告框的復用類示例
本文實例講述了Android 開發使用PopupWindow實現彈出警告框的復用類。分享給大家供大家參考,具體如下:
Android開發中相信下圖所示界面大家都不陌生,該種彈出框的使用頻率也是極高的,所以我專門謝了個類用于方便的彈出該界面。并把確定或取消后的邏輯通過抽象方法的方式讓用戶自己實現,大大提高了開發效率。下面是該類:
package com.***.popupwindow;import ******;public abstract class MyPopupWindow { private PopupWindow popupWindow; private Activity context; private String content; private String positiveWord = '確定'; private String negativeWord = '取消'; /** * 構造函數 * * @param context */ public MyPopupWindow(Activity context) { this.context = context; } /** * 顯示警示框 */ 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(); } }); } /** * 確定鍵按下后執行 */ public abstract void sureClick(); /** * 取消鍵按下后執行 */ public abstract void cancelClick(); /** * 為警示設置警示內容 * * @param content */ public void setContent(String content) { this.content = content; } /** * 設置確定鍵文字 * * @param positiveWord */ public void setPositiveWord(String positiveWord) { this.positiveWord = positiveWord; } /** * 設置取消鍵文字 * * @param negativeWord */ public void setNegativeWord(String negativeWord) { this.negativeWord = negativeWord; } /** * 手動取消警示框 */ public void dismiss() { popupWindow.dismiss(); }}
其中彈出框用到的布局popup.xml代碼如下:
<?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>
下面簡單的使用一下:在界面放一個按鈕,按鈕點擊后彈出警告框。代碼如下:
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, '確定', Toast.LENGTH_SHORT).show(); } @Override public void cancelClick() { Toast.makeText(MainActivity.this, '取消', Toast.LENGTH_SHORT).show(); }};myPopupWindow.setContent('確定退出?');myPopupWindow.show(); } }); }}
即如下效果:
So,以后使用只需要簡單調用幾句代碼就好了!
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