<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.test01"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.test01.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".Activity01"
            android:label="@string/activity01"
            android:icon="@drawable/authentication_name_n">
            <intent-filter >
                <action android:name="cxd.test.demo"/>
            </intent-filter>
        </activity>
        <activity android:name=".Activity02"
            android:label="@string/activity02"
            android:icon="@drawable/box_tj_h">
            <intent-filter >
                <action android:name="cxd.test.demo"/>
            </intent-filter>
        </activity>
        <activity android:name=".Activity03"
            android:label="@string/activity03"
            android:icon="@drawable/box_tj">
            <intent-filter >
                <action android:name="cxd.test.demo"/>
            </intent-filter>
        </activity>
    </application>

</manifest>

这个是在manifest.xml配置文件中每个activity中配置了一个intent的行动，然后在MainActivity中

public class MainActivity extends ListActivity {

	private PackageManager mPackageManager;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		mPackageManager = getPackageManager();

		List<ResolveInfo> activities = mPackageManager.queryIntentActivities(
				makeDemoActivityIntent(), PackageManager.GET_META_DATA);
		getListView().setAdapter(
				new ActivityListAdapter(this, activities, mPackageManager));
	}

	protected Intent makeDemoActivityIntent() {
		Intent intent = new Intent(Constants.DEMO_ACTION);
		return intent;
	}
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
	
	@Override
	protected void onListItemClick(ListView l, View v, int position, long id) {
		// TODO Auto-generated method stub
		ActivityInfo resolveInfo = ((ResolveInfo) l.getItemAtPosition(position)).activityInfo;
		Intent intent = new Intent();
		intent.setComponent(new ComponentName(resolveInfo.packageName,
				resolveInfo.name));
		startActivity(intent);
	}

}

Intent intent = new Intent(Constants.DEMO_ACTION);参数就是
<action android:name="cxd.test.demo"/>里的参数
public class ActivityListAdapter extends BaseAdapter {
	private List<ResolveInfo> mData;
	private LayoutInflater mInflater;
	private PackageManager mPackageManager;

	public ActivityListAdapter(Context context, List<ResolveInfo> data,
			PackageManager packagetManager) {
		mData = data;
		mInflater = LayoutInflater.from(context);
		mPackageManager = packagetManager;
	}

	@Override
	public int getCount() {
		return mData.size();
	}

	@Override
	public ResolveInfo getItem(int position) {
		return mData.get(position);
	}

	@Override
	public long getItemId(int position) {
		return 0;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		ResolveInfo resolveInfo = getItem(position);
		if (null == convertView) {
			convertView = mInflater.inflate(
					android.R.layout.simple_list_item_1, parent, false);
		}
		((TextView) convertView)
				.setText(resolveInfo.loadLabel(mPackageManager));
		((TextView) convertView).setCompoundDrawables(
				resolveInfo.loadIcon(mPackageManager), null, null, null);
		return convertView;
	}
}
在ListActivity中点击每一个item然后就可以进入到activity中去，如果要做中文匹配的话在res文件里面新建values-zh-rCN.xml配置文件中新建string.xml文件，写中文版的

main界面视图：

1.JsonRequest   没有有效的json地址，找了google的，400，请替换有效json地址就OK

2.使用的NetWorkImageView

3.使用的ImageRequest

主要说明下ImageRequest，ImageRequest中已经自带了缓存，只需要在代码的地方设置setShouldCache(true)；就OK了

通过Volley中的代码，   

public static RequestQueue newRequestQueue(Context context, HttpStack stack) {
        File cacheDir = new File(context.getCacheDir(), “volley”);

可以知道图片缓存在data/data/package/cache/volley下，缓存key直接使用的是URL，

通过代码

RequestQueue queue = new RequestQueue(new DiskBasedCache(cacheDir), network);

可以知道使用的是DiskBasedCache这个类

可以打开这个类，能发现使用一个Map存储的信息

/** Map of the Key, CacheHeader pairs */
    private final Map<String, CacheHeader> mEntries =
            new LinkedHashMap<String, CacheHeader>(16, .75f, true); 

CacheHeader为DiskBasedCache中的内部类,其实就是一个bean，其中保存了key，length，etag，serverDate等等一系列做缓存是否更新校验的字段

RequestQueue 缓存处理是通过CacheDispatcher做缓存事件分发，同过entry.refreshNeeded()来确定是取缓存还是请求网络。

项目源码地址：http://download.csdn.net/detail/cj6585256/6407947

有人说下载缺少文件，把Volley源文件地址给上：http://download.csdn.net/detail/cj6585256/6407971

无网络时取的缓存图