程序A的Receiver：
receiver = new BroadcastReceiver() 
{
@Override
public void onReceive(Context ctx, Intent intent) {
Log.i("TestActivity", "===============Broadcast Received:" + intent.getAction());
if (intent.getAction().equals(RESPONSE_ACTION)) {
Uri uri = intent.getData();
String location = "";
if (uri != null) {
Log.i("TestActivity",
"=======================parameter location:"
+ uri.getQueryParameter("location"));
Log.i("TestActivity", "======================= host:"
+ uri.getHost());
Log.i("TestActivity", "======================= path:"
+ uri.getPath());
location = uri.getQueryParameter("location");
FileInputStream fis = null;
ByteArrayOutputStream bos = null;
File file = new File(location);
try {
fis = new FileInputStream(file);
bos = new ByteArrayOutputStream();
byte[] data = new byte[512];
int count = -1;
while ((count = fis.read(data)) != -1) {
bos.write(data, 0, count);
}
String xml = new String(bos.toByteArray());
Log.i("TestActivity", "xml1=" + xml);
Toast.makeText(TestActivity.this, xml, Toast.LENGTH_SHORT).show();
} catch (Exception ex) {
ex.printStackTrace();
} finally {
if (fis != null)
try {
fis.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (bos != null)
try {
bos.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
};
IntentFilter filter = new IntentFilter();
filter.addAction(RESPONSE_ACTION);
filter.addCategory(Intent.CATEGORY_DEFAULT);
filter.addDataScheme("http");
registerReceiver(receiver, filter);
程序A的發(fā)送BC：
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Uri uri = Uri.parse("http://www.xx.com/getDetails?id=123");
Intent in = new Intent();
in.setAction(REQUEST_ACTION);
in.addCategory(Intent.CATEGORY_DEFAULT);
in.setData(uri);
TestActivity.this.sendBroadcast(in);
}
});
程序B的Receiver：
@Override
public void onReceive(Context context, Intent intent) {
if(intent != null)
{
Uri uri = intent.getData();
if(uri != null)
{
Log.i("BGServiceReceiver", "=======================" + uri.getQueryParameter("id"));
intent.setClassName("com.backgroundservice",
"com.backgroundservice.TestBackgroundService");
context.startService(intent);
}
}
// try {
// Thread.sleep(5000);
// } catch (InterruptedException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
}
配置：
<receiver android:name="ServiceReceiver">
<intent-filter>
<action android:name="android.intent.action.STORE_REQUEST"></action>
<category android:name="android.intent.category.DEFAULT"></category>
<data android:scheme="http"></data>
</intent-filter>
</receiver>
程序B的發(fā)送BC：
Intent in = new Intent();
in.setAction(RESPONSE_ACTION);
in.addCategory(Intent.CATEGORY_DEFAULT);
in.setData(Uri.parse("http://www.xx.com/setList?location=/sdcard/xx.xml"));
this.sendBroadcast(in);
如果想讓目標(biāo)Activity或者Service接收到相應(yīng)的Broadcast，就需要完全匹配目標(biāo)Activity或者Service的IntentFilter，否則目標(biāo)Filter無法接收到相應(yīng)的Broadcast。注意：IntentFilter設(shè)置的時候都要默認(rèn)帶上CATEGORY_DEFAULT，否則可能會造成潛在問題。
文檔中的說明如下：
In principle, therefore, an Intent object with no categories should always pass this test, regardless of what's in the filter. That's mostly true. However, with one exception, Android treats all implicit intents passed to
startActivity() as if they contained at least one category: "
android.intent.category.DEFAULT" (the
CATEGORY_DEFAULT constant). Therefore, activities that are willing to receive implicit intents must include "
android.intent.category.DEFAULT" in their intent filters.
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posted on 2010-01-31 19:48
TiGERTiAN 閱讀(4921)
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