Alertialog警告对话框的用法

最新推荐文章于 2025-06-11 00:15:00 发布

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#android应用 #Dialog

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本文详细介绍了Android中五种对话框的实现方式，包括普通对话框、列表形式对话框、单选对话框、多选对话框及自定义样式的对话框，并提供了具体的代码示例。

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1、普通对话框，效果如图：

代码：

第一种写法：

private void dialog() {
	Dialog dialog = new AlertDialog.Builder(this)
			.setTitle("对话框的标题")
			.setMessage("对话框的内容")
			.setIcon(R.drawable.ic_launcher)
			// 自定义图标
			.setCancelable(false)
			// 设置焦点，false时点击屏幕其他地方和返回键都不操作
			.setPositiveButton("确定", new DialogInterface.OnClickListener() {
				@Override
				public void onClick(DialogInterface dialog, int which) {
					Toast.makeText(getApplicationContext(), "点击确定按钮",
							Toast.LENGTH_SHORT).show();
				}
			})
			.setNegativeButton("取消", new DialogInterface.OnClickListener() {
				@Override
				public void onClick(DialogInterface dialog, int which) {
					Toast.makeText(getApplicationContext(), "点击取消按钮",
							Toast.LENGTH_SHORT).show();
				}
			})
			.setNeutralButton("中立", new DialogInterface.OnClickListener() {
				@Override
				public void onClick(DialogInterface dialog, int which) {
					Toast.makeText(getApplicationContext(), "点击中立按钮",
							Toast.LENGTH_SHORT).show();
				}
			}).create();
	dialog.show();
}

第二种写法只是代码样式不同，看个人习惯：

protected void dialog() {
	AlertDialog.Builder builder = new Builder(this);
	builder.setTitle("对话框的标题");
	builder.setMessage("对话框的内容");
	builder.setCancelable(false);
	builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
		@Override
		public void onClick(DialogInterface dialog, int which) {
			Toast.makeText(getApplicationContext(), "点击确定按钮",
					Toast.LENGTH_SHORT).show();
		}
	});
	builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
		@Override
		public void onClick(DialogInterface dialog, int which) {
			Toast.makeText(getApplicationContext(), "点击取消按钮",
					Toast.LENGTH_SHORT).show();
		}
	});
	builder.create().show();
}

注意：布局中的内容以及按钮如果不需要可以直接去掉不写

2、列表的形式，效果如图：

代码：

private void dialog() {
	final String[] arrayFruit = new String[] { "苹果", "橘子", "草莓", "香蕉" };
	Dialog alertDialog = new AlertDialog.Builder(this)
			.setTitle("你喜欢吃哪种水果？")
			.setIcon(R.drawable.ic_launcher)
			.setItems(arrayFruit, new DialogInterface.OnClickListener() {
				@Override
				public void onClick(DialogInterface dialog, int which) {
					Toast.makeText(getApplicationContext(),
							arrayFruit[which], Toast.LENGTH_SHORT).show();
				}
			})
			.setPositiveButton("确定", new DialogInterface.OnClickListener() {
				@Override
				public void onClick(DialogInterface dialog, int which) {
					Toast.makeText(getApplicationContext(), "点击确定按钮",
							Toast.LENGTH_SHORT).show();
					}
				}).create();
		alertDialog.show();
	}

3、单选框的形式，效果如图：

代码：

String fruit = "选择水果";
private void dialog() {
	final String[] arrayFruit = new String[] { "苹果", "橘子", "草莓", "香蕉" };
	Dialog alertDialog = new AlertDialog.Builder(this)
			.setTitle("你喜欢吃哪种水果？")
			.setIcon(R.drawable.ic_launcher)
			.setSingleChoiceItems(arrayFruit, 0,
					new DialogInterface.OnClickListener() {
						@Override
						public void onClick(DialogInterface dialog,
								int which) {
							fruit = arrayFruit[which];
							Toast.makeText(getApplicationContext(),
									arrayFruit[which], Toast.LENGTH_SHORT)
									.show();
						}
					})
			.setPositiveButton("确认", new DialogInterface.OnClickListener() {
				@Override
				public void onClick(DialogInterface dialog, int which) {
					Toast.makeText(getApplicationContext(), "选择了" + fruit,
							Toast.LENGTH_SHORT).show();
				}
			})
			.setNegativeButton("取消", new DialogInterface.OnClickListener() {
				@Override
				public void onClick(DialogInterface dialog, int which) {
					Toast.makeText(getApplicationContext(), "点击取消按钮",
							Toast.LENGTH_SHORT).show();
				}
			}).create();
	alertDialog.show();
}

4、多选框的形式，效果如图：

代码：

private void dialog() {
	final String[] arrayFruit = new String[] { "苹果", "橘子", "草莓", "香蕉" };
	final boolean[] arrayFruitSelected = new boolean[] { true, true, false,
			false };
	Dialog alertDialog = new AlertDialog.Builder(this)
			.setTitle("你喜欢吃哪种水果？")
			.setIcon(R.drawable.ic_launcher)
			.setMultiChoiceItems(arrayFruit, arrayFruitSelected,
					new DialogInterface.OnMultiChoiceClickListener() {
						@Override
						public void onClick(DialogInterface dialog,
								int which, boolean isChecked) {
							arrayFruitSelected[which] = isChecked;
						}
					})
			.setPositiveButton("确认", new DialogInterface.OnClickListener() {
				@Override
				public void onClick(DialogInterface dialog, int which) {
					StringBuilder stringBuilder = new StringBuilder();
					for (int i = 0; i < arrayFruitSelected.length; i++) {
						if (arrayFruitSelected[i] == true) {
							stringBuilder.append(arrayFruit[i] + "、");
						}
					}
					Toast.makeText(getApplicationContext(),
							stringBuilder.toString(), Toast.LENGTH_SHORT)
							.show();
				}
			})
			.setNegativeButton("取消", new DialogInterface.OnClickListener() {
				@Override
				public void onClick(DialogInterface dialog, int which) {
					Toast.makeText(getApplicationContext(), "点击取消按钮",
							Toast.LENGTH_SHORT).show();
				}
			}).create();
	alertDialog.show();
}

5、自定义样式，效果如图：

代码：

(1)先定义自己的布局，这里我就简单写一个：

dialog.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
<TextView
      android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="我的自定义:" />
<EditText
        android:id="@+id/et_content"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:hint="请输入内容" />
</LinearLayout>

(2)把自定义放在dialog中

private void dialog() {
	LayoutInflater layoutInflater = LayoutInflater.from(this);
	View myDialog = layoutInflater.inflate(R.layout.dialog, null);
	final EditText editText = (EditText) myDialog
			.findViewById(R.id.et_content);
	Dialog alertDialog = new AlertDialog.Builder(this)
			.setTitle("自定义布局")
			.setIcon(R.drawable.ic_launcher)
			.setView(myDialog)
			.setPositiveButton("确定", new DialogInterface.OnClickListener() {
				@Override
				public void onClick(DialogInterface dialog, int which) {
					String msg = editText.getText().toString();
					Toast.makeText(getApplicationContext(), msg,
						Toast.LENGTH_SHORT).show();
				}
			})
			.setNegativeButton("取消", new DialogInterface.OnClickListener() {
				@Override
				public void onClick(DialogInterface dialog, int which) {
					Toast.makeText(getApplicationContext(), "点击取消按钮",
							Toast.LENGTH_SHORT).show();
				}
			}).create();
	alertDialog.show();
}

了解更多Dialog的用法，请点击http://blog.youkuaiyun.com/u013985004/article/details/25634335