学习日记--dialog的基本用法测试

本测试实现了dialog的基本选择，单项选择，多项选择以及自定义选择的简单实例：

昨天的测试中：menu的一些item写在了java代码里面，所以不是很规范，应该写在res的menu文件夹下，把代码尽可能的拆分开，后期维护比较方便一点。

效果如下：

一、menu/main.xml (相关menu的一些item)

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context="comhxzy.menu_dialog.MainActivity" >

    <item
        android:id="@+id/self_define_list"
        android:orderInCategory="95"
        android:showAsAction="never"
        android:title="自定义list"/>
    <item
        android:id="@+id/self_define"
        android:orderInCategory="96"
        android:showAsAction="never"
        android:title="自定义选项"/>
    <item
        android:id="@+id/multipleOption"
        android:orderInCategory="97"
        android:showAsAction="never"
        android:title="多项选项"/>
    <item
        android:id="@+id/singeOption"
        android:orderInCategory="98"
        android:showAsAction="never"
        android:title="单项选项"/>
    <item
        android:id="@+id/Option"
        android:orderInCategory="99"
        android:showAsAction="never"
        android:title="选择"/>

</menu>

二、java代码

package comhxzy.menu_dialog;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.DialogInterface.OnMultiChoiceClickListener;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
	private String[] data;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {

			@Override
			public void onClick(View v) {
				/**
				 * Programmatically opens the options menu. If the options menu
				 * is already open, this method does nothing.
				 */
				openOptionsMenu();

			}
		});
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {

		// 自定义list
		case R.id.self_define_list: {
			data = new String[50];

			Builder builder = new AlertDialog.Builder(this);
			LayoutInflater mLayoutInflater = getLayoutInflater();
			View view = mLayoutInflater.inflate(R.layout.list, null);

			ListView lv = (ListView) view.findViewById(R.id.listView);
			MyAdapter adapter = new MyAdapter(this, -1);
			lv.setAdapter(adapter);

			// 添加点击事件
			lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {

				@Override
				public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
					Toast.makeText(MainActivity.this, "短按：" + position, Toast.LENGTH_SHORT).show();
				}

			});

			/**
			 * 注意此方法的返回布尔值，如果为true，则停止当前点击事件（在当前测试中只会显示“长按+position”），
			 * 如果为false,执行完之后还会执行其它点击事件(在当前测试中还会显示onItemClick点击事件toast显示：
			 * ”短按：+position“,所以此方法的返回布尔值一般设为true。)
			 */
			lv.setOnItemLongClickListener(new OnItemLongClickListener() {

				@Override
				public boolean onItemLongClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
					Toast.makeText(MainActivity.this, "长按：" + position, Toast.LENGTH_SHORT).show();
					return true;
				}
			});

			builder.setTitle("自定义list");
			builder.setView(view);
			builder.create().show();
			break;
		}

			// 自定义选项
		case R.id.self_define: {

			/**
			 * self_define为自己写的layout布局文件，根据自己的需求来写，
			 * 本例包含了一个ImageView和一个TextView。
			 */
			LayoutInflater mLayoutInflater = getLayoutInflater();

			View view = mLayoutInflater.inflate(R.layout.self_define, null);
			Builder builder = new AlertDialog.Builder(this).setView(view);
			builder.create().show();
			break;
		}

			// 多项选项
		case R.id.multipleOption: {
			final String[] items = { "选项1", "选项2", "选项3" };

			/**
			 * checkedItems数组的长度对应items数组的长度，初始可以设为false，如果
			 * 设成true，打开对话框的时候，如果设成true，数组下标对应的框是被勾选的
			 */
			final boolean[] checkedItems = { false, false, false };

			// 写成AlertDialog dialog = new AlertDialog.Builder(this)......
			// .creat();也可以，个人喜好；
			final Builder multiple = new AlertDialog.Builder(this).setMultiChoiceItems(items, checkedItems,
					new OnMultiChoiceClickListener() {

						@Override
						public void onClick(DialogInterface dialog, int which, boolean isChecked) {

						}
					});

			AlertDialog dialog = multiple.create();
			dialog.setTitle("系统选项");

			dialog.setButton(DialogInterface.BUTTON_NEGATIVE, "确定", new OnClickListener() {

				@Override
				public void onClick(DialogInterface dialog, int which) {
					String s = "";
					for (int i = 0; i < checkedItems.length; i++) {
						if (checkedItems[i]) {
							s = s + "" + items[i] + ",";
						}
					}
					Toast.makeText(getApplicationContext(), "选择了:" + s, 1).show();
				}
			});

			dialog.show();
			break;
		}

			// 单项选项
		case R.id.singeOption: {
			final String[] singe = { "选项1", "选项2", "选项3" };

			/**
			 * 此处的-1代表初始化都不勾选； 设置0到在数组长度-1之内的数，则初始化对应数组下标进行勾选；
			 * 如果设置的数字大于等于数组长度，默认也为-1
			 */
			AlertDialog dialog = new AlertDialog.Builder(this).setSingleChoiceItems(singe, -1, new OnClickListener() {

				@Override
				public void onClick(DialogInterface dialog, int which) {
					Toast.makeText(getApplicationContext(), singe[which], 0).show();
					dialog.dismiss();
				}
			}).create();
			dialog.setTitle("singeOption");
			dialog.show();
			break;
		}

			// 基本选项
		case R.id.Option: {
			final String[] items = { "选项1", "选项2", "选项3" };
			Builder builder = new AlertDialog.Builder(this).setItems(items, new OnClickListener() {

				@Override
				public void onClick(DialogInterface dialog, int which) {

					myTask(items[which]);
				}
			});

			AlertDialog dialog = builder.create();
			dialog.setTitle("Option");
			dialog.show();
			break;
		}

		default:
			break;
		}

		return super.onOptionsItemSelected(item);
	}

	public void myTask(final String s) {
		Builder builder = new AlertDialog.Builder(this);
		// PositiveButton为确定的按钮
		builder.setPositiveButton("确定：" + s, new OnClickListener() {

			@Override
			public void onClick(DialogInterface dialog, int which) {
				Toast.makeText(getApplicationContext(), s, 0).show();

			}
		});

		// PositiveButton为否定的按钮
		builder.setNegativeButton("取消", new OnClickListener() {

			@Override
			public void onClick(DialogInterface dialog, int which) {
				dialog.dismiss();

			}
		});

		AlertDialog dialog = builder.create();
		dialog.setTitle("系统提示");
		dialog.setMessage("请确认你的选择");
		dialog.show();

	}

	private class MyAdapter extends ArrayAdapter<String> {
		LayoutInflater inflater;

		public MyAdapter(Context context, int resource) {
			super(context, resource);
			inflater = LayoutInflater.from(getApplicationContext());
		}

		@Override
		public int getCount() {
			return data.length;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			if (null == convertView) {
				convertView = inflater.inflate(R.layout.list_item, null);
			}
			TextView text = (TextView) convertView.findViewById(R.id.text);
			text.setText("data" + position);

			return convertView;
		}
	}
}

三.layout布局文件

1.activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="comhxzy.menu_dialog.MainActivity" >

   <Button
       android:id="@+id/button"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:layout_alignParentRight="true"
       android:layout_alignParentTop="true"
       android:layout_marginRight="18dp"
       android:layout_marginTop="30dp" 
       android:text="点击出现菜单"/>

</RelativeLayout>

2.list_item.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" >

    <ImageView
        android:id="@+id/image"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher" />

    <TextView
        android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

3.list.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="horizontal" >

    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </ListView>

</LinearLayout>

4.self_define.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ImageView
        android:id="@+id/image"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:src="@drawable/ic_launcher" />

    <Button
        android:id="@+id/button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/image"
        android:layout_centerInParent="true"
        android:text="自定义按钮" />

</RelativeLayout>