AlertDialog的实现

课程Demo

重点解析自定义对话框

public class MainActivity extends AppCompatActivity {
    private Button bt1;
    private Button bt2;
    private Button bt3;
    private Button bt4;
    private Button bt5;
    private Button testbt;
    private EditText edit;
    private TextView text1;
    private String singleitem[]={"男","女","人妖"};
    private String moreitem[]={"杨幂","刘诗诗","宋茜","古力娜扎"};
    private String listitem[]={"杨幂","刘诗诗","宋茜","古力娜扎"};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        bt1= (Button) findViewById(R.id.bt1);
        bt2= (Button) findViewById(R.id.bt2);
        bt3= (Button) findViewById(R.id.bt3);
        bt4= (Button) findViewById(R.id.bt4);
        bt5= (Button) findViewById(R.id.bt5);
        showDialog1();
        showDialog2();
        showDialog3();
        showDialog4();
        showDialog5();
    }
    //普通对话框的实现
    private void showDialog1() {
         bt1.setOnClickListener(new View.OnClickListener() {
            AlertDialog.Builder build=new AlertDialog.Builder(MainActivity.this);
            @Override
            public void onClick(View v) {
                build.setTitle("确认对话框");
                build.setIcon(R.drawable.she);
                build.setMessage("是否确定你的选择");
                build.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(MainActivity.this,"点击了确定按钮",Toast.LENGTH_SHORT).show();
                    }
                });
                build.setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(MainActivity.this,"点击了取消按钮",Toast.LENGTH_SHORT).show();
                        dialog.dismiss();
                    }
                });
                AlertDialog dialog=build.create();
                dialog.show();
            }
        });
    }
    //单选对话框的实现
    private void showDialog2() {
        bt2.setOnClickListener(new View.OnClickListener() {
            AlertDialog.Builder build=new AlertDialog.Builder(MainActivity.this);
            @Override
            public void onClick(View v) {
                build.setIcon(R.drawable.she);
                build.setTitle("你的性别是：");
  //singleitem:存放数据的数据名 0：默认选择第一个
                build.setSingleChoiceItems(singleitem, 0, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(MainActivity.this,"你的性别为"+singleitem[which],Toast.LENGTH_SHORT).show();
                    }
                });
                AlertDialog dialog=build.create();
                dialog.show();
            }
        });
    }
    //多选对话框的实现
    private void showDialog3() {
        bt3.setOnClickListener(new View.OnClickListener() {
            AlertDialog.Builder build = new AlertDialog.Builder(MainActivity.this);
            @Override
            public void onClick(View v) {
                build.setTitle("多选对话框");
                build.setIcon(R.drawable.she);
                build.setTitle("你喜欢的人是:");
                build.setMultiChoiceItems(moreitem, null, new DialogInterface.OnMultiChoiceClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which, boolean isChecked) {
                        if (isChecked) {
                            Toast.makeText(MainActivity.this, "你喜欢:" + moreitem[which], Toast.LENGTH_SHORT).show();
                        }
                        else{
                            Toast.makeText(MainActivity.this, "你不喜欢:" + moreitem[which], Toast.LENGTH_SHORT).show();
                        }
                    }
                });
                AlertDialog dialog = build.create();
                dialog.show();
            }
               });
            }
    //列表对话框的实现
    private void showDialog4() {
        bt4.setOnClickListener(new View.OnClickListener() {
            AlertDialog.Builder build = new AlertDialog.Builder(MainActivity.this);
            @Override
            public void onClick(View v) {
                build.setIcon(R.drawable.she);
                build.setTitle("你喜欢的人是:");
                build.setItems(listitem, new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                Toast.makeText(MainActivity.this, "我更喜欢:" +listitem[which], Toast.LENGTH_SHORT).show();
                            }
                        });
                        AlertDialog dialog = build.create();
                     dialog.show();
            }
        });
    }
    //自定义对话框的实现
    private void showDialog5() {
        bt5.setOnClickListener(new View.OnClickListener() {
            AlertDialog.Builder build = new AlertDialog.Builder(MainActivity.this);
            @Override
            public void onClick(View v) {
                    //设置对话框标题
                       build.settitle("测试你们的缘分");
                //设置对话框图标

                build.setIcon(R.drawable.she);
                      //创建视图
                LayoutInflater inflate=LayoutInflater.from(MainActivity.this);
                final View view=inflate.inflate(R.layout.view,null);
                     // 加载视图
                build.setView(view);
                testbt= (Button) view.findViewById(R.id.testbt);
                     //创建对话框
                AlertDialog dialog = build.create();
                testbt.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) 
               //想获取对话框中的EditText的值，必须在初始化的时候加所在View对象view 的findViewById方法
                   edit=(EditText) view.findViewById(R.id.edit);

                        text1=(TextView)view.findViewById(R.id.text1);
                       text1.setText("你与"+edit.getText()+"有三生三世十里桃花的缘分");
                    }
                });
                build.setPositiveButton("退出", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(MainActivity.this,"退出对话框",Toast.LENGTH_SHORT).show();
                                 //退出对话框
                        dialog.dismiss();
                    }
                });
                             //展示对话框
                dialog.show();
            }
        });
    }
}
附view.xml配置文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="请输入你喜欢的人"/>
        <EditText
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/edit"/>
        <Button
            android:text="测试缘分"
            android:id="@+id/testbt"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </LinearLayout>
    <ImageView
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:src="@drawable/she"/>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/text1"
        android:hint="即将揭晓你和她的缘分"/>
</LinearLayout>