Android AlertDialog的几种用法详解

<?xml version=\"1.0\" encoding=\"utf-8\"?>
<LinearLayout
    xmlns:android=\"http://schemas.android.com/apk/res/android\"
    xmlns:app=\"http://schemas.android.com/apk/res-auto\"
    xmlns:tools=\"http://schemas.android.com/tools\" android:layout_width=\"match_parent\"
    android:layout_height=\"match_parent\"
    android:orientation=\"vertical\"
    tools:context=\"com.example.lesson7_3_id19_alertdialog.MainActivity\">

    <Button
        android:layout_width=\"match_parent\"
        android:layout_height=\"wrap_content\"
        android:text=\"简单的dialog\"
        android:onClick=\"dialog_1\"/>
    <Button
        android:layout_width=\"match_parent\"
        android:layout_height=\"wrap_content\"
        android:text=\"列表的dialog\"
        android:onClick=\"dialog_2\"/>
    <Button
        android:layout_width=\"match_parent\"
        android:layout_height=\"wrap_content\"
        android:text=\"单选的dialog\"
        android:onClick=\"dialog_3\"/>
    <Button
        android:layout_width=\"match_parent\"
        android:layout_height=\"wrap_content\"
        android:text=\"多选的dialog\"
        android:onClick=\"dialog_4\"/>
    <Button
        android:layout_width=\"match_parent\"
        android:layout_height=\"wrap_content\"
        android:text=\"自定义View的dialog\"
        android:onClick=\"dialog_5\"/>
    <Button
        android:layout_width=\"match_parent\"
        android:layout_height=\"wrap_content\"
        android:text=\"使用adapter的dialog\"
        android:onClick=\"dialog_6\"/>
</LinearLayout>

package com.example.lesson7_3_id19_alertdialog;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    public void dialog_1(View v){
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setIcon(R.mipmap.ic_launcher_round);

        builder.setTitle(\"标题栏\");
        builder.setMessage(\"正文部分，简单的文本\");
        builder.setPositiveButton(\"确定\",new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(MainActivity.this, \"点击了确定\", Toast.LENGTH_SHORT).show();
            }
        });
        builder.setNegativeButton(\"取消\",null);
        builder.setNeutralButton(\"中立\",null);
        AlertDialog alertDialog = builder.create();
        alertDialog.show();

    }
    private String [] item = {\"游戏\",\"运动\",\"电影\",\"旅游\",\"看书\"};
    public void dialog_2(View v){
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle(\"请选择\");
        builder.setItems(item, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(MainActivity.this, \"选择了\"+item[which], Toast.LENGTH_SHORT).show();
            }
        });
        // 取消可以不添加
        //builder.setNegativeButton(\"取消\",null);
        AlertDialog alertDialog = builder.create();
        alertDialog.show();

    }
    int index;
    public void dialog_3(View v){
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle(\"请选择\");
        builder.setSingleChoiceItems(item, index, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                index = which;
            }
        });
        builder.setPositiveButton(\"确定\", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(MainActivity.this, \"选择了\"+item[index], Toast.LENGTH_SHORT).show();
            }
        });
        builder.setNegativeButton(\"取消\",null);
        AlertDialog alertDialog = builder.create();
        alertDialog.show();
    }
    // 设置boolean数组所有的选项设置默认没选
    boolean[] bools = {false,false,false,false,false};
    public void dialog_4(View v){
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle(\"请选择\");
        builder.setMultiChoiceItems(item, bools, new DialogInterface.OnMultiChoiceClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which, boolean isChecked) {
                bools[which] = isChecked;
            }
        });
        builder.setPositiveButton(\"确定\", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                StringBuffer sb = new StringBuffer();
                for (int i = 0; i < item.length; i++) {
                    if (bools[i]) {
                       sb.append(item[i] + \" \");
                    }
                }
                Toast.makeText(MainActivity.this, \"选择了\" + sb.toString(), Toast.LENGTH_SHORT).show();
            }
        });
        builder.setNegativeButton(\"取消\",null);
        AlertDialog alertDialog = builder.create();
        alertDialog.show();
    }
    public void dialog_5(View v){
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle(\"连接wifi\");
        final EditText et = new EditText(this);
        et.setHint(\"请输入密码\");
        et.setSingleLine(true);
        builder.setView(et);
        builder.setNegativeButton(\"取消\",null);
        builder.setPositiveButton(\"确定\", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                String password = et.getText().toString();
                if (password.equals(\"123456\")) {
                    Toast.makeText(MainActivity.this, \"连接成功\", Toast.LENGTH_SHORT).show();
                }else{
                    Toast.makeText(MainActivity.this, \"密码错误\", Toast.LENGTH_SHORT).show();
                }
            }
        });
        AlertDialog alertDialog = builder.create();
        alertDialog.show();

    }
    public void dialog_6(View v){
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,item);
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle(\"使用适配器\");
        builder.setAdapter(adapter, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(MainActivity.this, \"选择了\"+item[which], Toast.LENGTH_SHORT).show();
            }
        });
        AlertDialog alertDialog = builder.create();
        alertDialog.show();
    }
}