本文實例講述了Android 開發使用PopupWindow實現彈出警告框的複用類。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於方便的彈出該界面。並把確定或取消後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(); } }); } /** * 確定鍵按下後執行 */ public abstract void sureClick(); /** * 取消鍵按下後執行 */ 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(); } }
其中彈出框用到的佈局popup.xml代碼如下:
下面簡單的使用一下:在界面放一個按鈕,按鈕點擊後彈出警告框。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,以後使用只需要簡單調用幾句代碼就好了!
[zhang3221994 ] Android 開發使用PopupWindow實現彈出警告框的複用類示例已經有396次圍觀