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系统默认的AlertDialog,与项目的UI不统一,所以,改了一下,定义了一样式,最终效果如下图:
另外,为了尽量少改原来的代码,该类类名及相关方法名都与android.app.AlertDialog相同,使用时,原代码只需要修改导入的包名,在按钮的Listener上加上一句关闭对话框的方法即可.
先是对话框的XML布局文件:
test.xml
<?xmlversion="1.0"encoding="utf-8"?><LinearLayoutxmlns:android="/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"><!--顶部椭园边缘--><ImageViewandroid:layout_width="400dp"android:layout_height="22dp"android:src="@drawable/dialog_top"></ImageView><!--中间白色背景,两个TextView,标题和内容,留一个LinearLayout,在代码中根据调用动态加上按钮--><LinearLayoutandroid:layout_width="400dp"android:layout_height="wrap_content"android:background="@drawable/dialog_center"android:orientation="vertical"><TextViewandroid:textColor="#000000"android:textSize="35dp"android:gravity="center"android:id="@+id/title"android:layout_width="fill_parent"android:layout_height="wrap_content"/><TextViewandroid:layout_marginLeft="20dp"android:layout_marginRight="10dp"android:id="@+id/message"android:layout_marginBottom="10dp"android:layout_marginTop="20dp"android:textColor="#000000"android:textSize="25dp"android:layout_width="fill_parent"android:layout_height="wrap_content"/><!--在LinearLayout中加按钮--><LinearLayoutandroid:id="@+id/buttonLayout"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_gravity="center"android:gravity="center"android:orientation="horizontal"></LinearLayout></LinearLayout><!--底部椭园边缘--><ImageViewandroid:layout_marginTop="-2dp"android:layout_width="400dp"android:layout_height="22dp"android:src="@drawable/dialog_bottom"></ImageView></LinearLayout>
按钮背景,不同状态不同,可参考本博相关文章:
alertdialog_button.xml
<?xmlversion="1.0"encoding="utf-8"?><selectorxmlns:android="/apk/res/android"><itemandroid:state_pressed="true"android:drawable="@drawable/dialog_button_pressed"/><itemandroid:state_focused="true"android:drawable="@drawable/dialog_button_pressed"/><itemandroid:drawable="@drawable/dialog_button"/></selector>
下面就是自定义的AlertDialog类的代码:
publicclassAlertDialog{Contextcontext;android.app.AlertDialogad;TextViewtitleView;TextViewmessageView;LinearLayoutbuttonLayout;publicAlertDialog(Contextcontext){//TODOAuto-generatedconstructorstubthis.context=context;ad=newandroid.app.AlertDialog.Builder(context).create();ad.show();//关键在下面的两行,使用window.setContentView,替换整个对话框窗口的布局Windowwindow=ad.getWindow();window.setContentView(R.layout.alertdialog);titleView=(TextView)window.findViewById(R.id.title);messageView=(TextView)window.findViewById(R.id.message);buttonLayout=(LinearLayout)window.findViewById(R.id.buttonLayout);}publicvoidsetTitle(intresId){titleView.setText(resId);}publicvoidsetTitle(Stringtitle){titleView.setText(title);}publicvoidsetMessage(intresId){messageView.setText(resId);}publicvoidsetMessage(Stringmessage){messageView.setText(message);}/***设置按钮*@paramtext*@paramlistener*/publicvoidsetPositiveButton(Stringtext,finalView.OnClickListenerlistener){Buttonbutton=newButton(context);LinearLayout.LayoutParamsparams=newLayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);button.setLayoutParams(params);button.setBackgroundResource(R.drawable.alertdialog_button);button.setText(text);button.setTextColor(Color.WHITE);button.setTextSize(20);button.setOnClickListener(listener);buttonLayout.addView(button);}/***设置按钮*@paramtext*@paramlistener*/publicvoidsetNegativeButton(Stringtext,finalView.OnClickListenerlistener){Buttonbutton=newButton(context);LinearLayout.LayoutParamsparams=newLayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);button.setLayoutParams(params);button.setBackgroundResource(R.drawable.alertdialog_button);button.setText(text);button.setTextColor(Color.WHITE);button.setTextSize(20);button.setOnClickListener(listener);if(buttonLayout.getChildCount()>0){params.setMargins(20,0,0,0);button.setLayoutParams(params);buttonLayout.addView(button,1);}else{button.setLayoutParams(params);buttonLayout.addView(button);}}/***关闭对话框*/publicvoiddismiss(){ad.dismiss();}}
使用方法:
finalAlertDialogad=newAlertDialog(Test.this);ad.setTitle("标题");ad.setMessage("内容sdfsafdasf内容内容内容内容内容内容内容内容内容内容内容内容内容内容内容内容内容内容内容内容内容内容内容内容内容内容内容");ad.setPositiveButton("确定",newOnClickListener(){@OverridepublicvoidonClick(Viewv){//TODOAuto-generatedmethodstubad.dismiss();Toast.makeText(Test.this,"被点到确定",Toast.LENGTH_LONG).show();}});ad.setNegativeButton("取消",newOnClickListener(){@OverridepublicvoidonClick(Viewv){//TODOAuto-generatedmethodstubad.dismiss();Toast.makeText(Test.this,"被点到取消",Toast.LENGTH_LONG).show();}});
