AlertDialog.Builder弹出各类窗口实现

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在activity_main.xml添加代码

<TextView    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="用于显示用资源xml文件定制的AlertDialog" />  <Button    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:text="AlertDialog.Builder弹出XML自定义Layout窗口"    android:id="@+id/btnAlertDialogWithXML"    android:onClick="onClicknAlertDialogWithXML"      android:layout_gravity="center_horizontal" />  <Button    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="没有资源的AlertDialog"    android:id="@+id/btnAlertDialog_NoRes"    android:onClick="onClickAlertNoRes"    android:layout_gravity="center_horizontal" /><Button    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="没有资源和按钮的AlertDialog"    android:id="@+id/btnAlertDialog_NoResNoBtn"    android:onClick="onClickAlertNoResNoBtn"    android:layout_gravity="center_horizontal" />

创建资源文件custom_alert_dialog_layout.xml

<?xml version="1.0" encoding="utf-8"?>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="match_parent" android:layout_height="match_parent">      <LinearLayout        android:orientation="horizontal"        android:layout_width="match_parent"        android:layout_height="wrap_content">          <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="警告对话框用于对客户发出警告信息，而不是用于输入信息,如果要输入信息建议用自定义对话框。自定义资源文件只是为了丰富提示信息。"            android:layout_gravity="center_horizontal" />        </LinearLayout>      <LinearLayout        android:orientation="horizontal"        android:layout_width="match_parent"        android:layout_height="wrap_content">        </LinearLayout>      <ImageView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/imageView"        android:src="@drawable/ic_launcher"        android:layout_gravity="center_horizontal" />  </LinearLayout>

添加MainActivity.java代码

public class MainActivity extends AppCompatActivity {      private  DialogInterface dialogWithXml;    private TextView tvAlertDialgoUserName,tvAlertDialgoPassword;      @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }      public void onClicknAlertDialogWithXML(View view) {        LayoutInflater inflater = LayoutInflater.from(this);        View layout=inflater.inflate(R.layout.custom_alert_dialog_layout, null);        AlertDialog.Builder builder =new AlertDialog.Builder(this);        builder.setView(layout);        builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                dialog.cancel();            }        });          // builder.setCancelable(false);  //设置不能按返回键取消        dialogWithXml=builder.create();        builder.show();    }      public void onClickAlertNoRes(View view) {        AlertDialog.Builder myAlert=new AlertDialog.Builder(this);        myAlert.setMessage("这里是AlertDialgo信息，点击确定退出")                .setPositiveButton("确定", new DialogInterface.OnClickListener() {                    @Override                    public void onClick(DialogInterface dialog, int which) {                        dialog.dismiss();                    }                })                .setTitle("这是标题")                .setIcon(R.drawable.ic_launcher)                .create();          myAlert.show();    }      public void onClickAlertNoResNoBtn(View view) {        AlertDialog.Builder myAlert=new AlertDialog.Builder(this);        myAlert.setMessage("这里是AlertDialgo信息,点击外围自动取消")                .create();        myAlert.show();    }}

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