android 对话框图片以外半透明 android对话框setview用法

Android中的对话框Dialog继承自Object，Dialog的生命周期由Activity来控制，当Dialog显示内容时，Activity会失去焦点，用户将在Dialog上进行操作；当Dialog消失后，Activity重新获得焦点。

对话框样式：

1. 按钮对话框：

点击确认进行页面跳转

点击说明进行消息提示

说明：
setIcon：设置对话框的图标
setTitle：设置对话框标题
setMessage：设置对话框消息
setView ： 对话框自定义样式设置
setItems：设置对话框中的列表
setPositiveButton：确定按钮的设置
setNegativeButton：取消按钮的设置
setNeutralButton：普通按钮的设置
setCancelable：false代表点击对话框外区域时，dialog不取消，反之为true(默认)
create ：创建对话框
show ：显示对话框
dismiss方法会释放对话框所占的资源(建议在activity中的onDestory中调用)

代码：

public class MainActivity extends AppCompatActivity {
    	@Override
	protected void onCreate(Bundle savedInstanceState) {
        	super.onCreate(savedInstanceState);
        	setContentView(R.layout.activity_main);
        	final Button bt1=findViewById(R.id.bt_1);
        	bt1.setOnClickListener(new View.OnClickListener() {
	    		@Override
	   		 public void onClick(View v){
	   		 ShowDialog();
	   		 }
	   	}
 	});
	private void ShowDialog(){
	    	AlertDialog.Builder dialog = new AlertDialog.Builder(MainActivity.this);
		dialog.setTitle("标题");
		dialog.setIcon(R.mipmap.ic_launcher);
		dialog.setMessage("消息");
		dialog.setNeutralButton("说明",new DialogInterface.OnClickListener() {
    			@Override
    			public void onClick(DialogInterface dialog, int which) {
        			Toast toast=Toast.makeText(MainActivity.this, "说明完毕", Toast.LENGTH_SHORT);
        			toast.show();
   			}
		});
		dialog.setPositiveButton("确认", new DialogInterface.OnClickListener() {
            		@Override
            		public void onClick(DialogInterface dialog, int which) {
                		Intent intent=new Intent(MainActivity.this,LoginActivity.class);
                		startActivity(intent);
           		}
       	 });
       	 dialog.setNegativeButton("取消",null);
        	dialog.setCancelable(false);//点击外部区域不取消dialog
        	dialog.create().show();
        }
}

2. 列表对话框

(onClick外部没有变化就不复制进来了，见谅)

代码：

private void ShowDialog(){
    final String[] items = {"A", "B", "C", "D"};
    AlertDialog.Builder dialog = new AlertDialog.Builder(MainActivity.this);
    dialog.setTitle("标题");
    dialog.setIcon(R.mipmap.ic_launcher);
    dialog.setItems(items, new DialogInterface.OnClickListener() {
        	@Override
        	public void onClick(DialogInterface dialog, int which) {
            	Toast toast=Toast.makeText(MainActivity.this, items[which], Toast.LENGTH_SHORT);
            	toast.show();
        	}
    });
    dialog.setNeutralButton("说明",new DialogInterface.OnClickListener() {
        	@Override
        	public void onClick(DialogInterface dialog, int which) {
            	Toast toast=Toast.makeText(MainActivity.this, "说明完毕", Toast.LENGTH_SHORT);
            	toast.show();
        	}
    });
    dialog.setNegativeButton("取消",null);
    dialog.setCancelable(false);
    dialog.create().show();
}

3.多选对话框

确认后根据选择结果进行消息提示：

代码：

private void ShowDialog(){
	final String[] items = {"A", "B", "C", "D"};
	final boolean[] aa=new boolean[]{true,true,false,false};
	AlertDialog.Builder dialog = new AlertDialog.Builder(MainActivity.this);
	dialog.setTitle("标题");
	dialog.setIcon(R.mipmap.ic_launcher);
	dialog.setNeutralButton("说明",new DialogInterface.OnClickListener() {
    		@Override
    		public void onClick(DialogInterface dialog, int which) {
        		Toast toast=Toast.makeText(MainActivity.this, "说明完毕", Toast.LENGTH_SHORT);
        		toast.show();
    		}
	});
	dialog.setMultiChoiceItems(items,aa, new DialogInterface.OnMultiChoiceClickListener(){
    		@Override
    		public void onClick(DialogInterface dialog, int which,boolean isChecked) {
        		aa[which]=isChecked;
    		}
	});
	dialog.setPositiveButton("确认", new DialogInterface.OnClickListener() {
    		@Override
    		public void onClick(DialogInterface dialog, int which) {
        		StringBuilder stringBuilder=new StringBuilder();
        		for(int i=0;i<aa.length;i++)
        		{
            			if (aa[i]==true) {
                			stringBuilder.append(items[i] + ",");
            			}
        		}
        		Toast.makeText(MainActivity.this,"确认选择："+stringBuilder.toString(), Toast.LENGTH_SHORT).show();
    		}
	});
	dialog.setNegativeButton("取消",null);
    	dialog.setCancelable(false);
    	dialog.create().show();
}

4. 单选对话框

点击确认后提示消息

代码：

private int select=0;
private void ShowDialog_radiobutton(){
    final String[] items={"苹果","西瓜","葡萄","哈密瓜","桃子"};
    AlertDialog.Builder dialog=new AlertDialog.Builder(MainActivity.this);
    dialog.setIcon(R.mipmap.ic_launcher)
    	.setTitle("最爱的水果")
      	.setSingleChoiceItems(items,select, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    select=which;
                    Toast.makeText(MainActivity.this,"选择"+items[select],Toast.LENGTH_SHORT).show();
                }
            })
    	.setPositiveButton("确定",
            new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    if (select != -1) {
                        Toast.makeText(MainActivity.this,"您最爱"+items[select],Toast.LENGTH_LONG).show();
                    }
                }
            });
    dialog.create().show();
}

5. 编辑对话框

输入后提示：

代码：

private void ShowEditDialog(){
    final EditText editText=new EditText(MainActivity.this);
    AlertDialog.Builder dialog=new AlertDialog.Builder(MainActivity.this);
    dialog.setTitle("请输入内容：");
    dialog.setView(editText);
    dialog.setPositiveButton("确定", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            Toast.makeText(MainActivity.this,"输入:"+editText.getText().toString(),Toast.LENGTH_SHORT).show();
        }
    });
    dialog.create().show();
}

6. 自定义对话框

确认后提示

页面布局：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:id="@+id/tv_username"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        android:layout_marginTop="20dp"
        android:layout_marginLeft="20dp"
        android:text="@string/tv_username"
        android:textSize="20sp"/>
    <EditText
        android:id="@+id/et_username"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintLeft_toRightOf="@+id/tv_username"
        app:layout_constraintBaseline_toBaselineOf="@id/tv_username"
        android:hint="请输入账号"/>
    <TextView
        android:id="@+id/tv_password"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:text="@string/tv_password"
        android:textSize="20sp"
        app:layout_constraintLeft_toLeftOf="@id/tv_username"
        app:layout_constraintTop_toBottomOf="@id/tv_username" />
    <EditText
        android:id="@+id/et_password"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintLeft_toLeftOf="@id/et_username"
        app:layout_constraintBaseline_toBaselineOf="@id/tv_password"
        android:hint="请输入密码"
        android:inputType="textPassword"/>
</android.support.constraint.ConstraintLayout>

代码：

private void ShowCustomizeDialog(){
    final View customize_dialog= LayoutInflater.from(MainActivity.this)
            .inflate(R.layout.activity_customize_dialog,null);
    AlertDialog.Builder dialog=new AlertDialog.Builder(MainActivity.this);
    dialog.setTitle("登陆")
            .setView(customize_dialog)
            .setPositiveButton("确定", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            EditText et_username=customize_dialog.findViewById(R.id.et_username);
            Toast.makeText(MainActivity.this,"欢迎用户"+et_username.getText().toString()+"登陆",Toast.LENGTH_SHORT)
                    .show();
        }
    })
            .create()
            .show();
}

7. 日期选择对话框

确认后提示

代码：

private void DateDialog(){
    Calendar calendar=Calendar.getInstance();
    DatePickerDialog dialog=new DatePickerDialog(MainActivity.this, new DatePickerDialog.OnDateSetListener() {
        @Override
        public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
            Toast.makeText(MainActivity.this,"选择日期"+year+"年"+(month+1)+"月"+dayOfMonth+"日".toString(),Toast.LENGTH_SHORT)
                    .show();
        }
    },calendar.get(Calendar.YEAR),calendar.get(Calendar.MONTH),calendar.get(Calendar.DAY_OF_MONTH));
    dialog.show();
}

8. 时间选择对话框

确认后提示

代码：

private void TimeDialog(){
    Calendar calendar=Calendar.getInstance();
    TimePickerDialog dialog=new TimePickerDialog(MainActivity.this, new TimePickerDialog.OnTimeSetListener() {
        @Override
        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
            Toast.makeText(MainActivity.this,"选择时间"+hourOfDay+"时"+minute+"分",Toast.LENGTH_SHORT)
                    .show();
        }
    },calendar.get(Calendar.HOUR_OF_DAY),calendar.get(Calendar.MINUTE),true);
    dialog.show();
}