[英]Crash when setting permissions in Android Manifest for networks
我一直在遵循一個教程 ,在該教程中 ,我試圖使用JavaOSC庫來添加本機Android應用程序發送OSC消息的功能 。
以下是我用於設置OSC線程的代碼:
private String myIP = "192.168.0.3";
private int myPort = 1234;
private OSCPortOut oscPortOut;
// This thread will contain all the code that pertains to OSC
private Thread oscThread = new Thread() {
@Override
public void run() {
try {
// Connect to some IP address and port
oscPortOut = new OSCPortOut(InetAddress.getByName(myIP), myPort);
Log.v(TAG, "CREATED PORT");
} catch(UnknownHostException e) {
Log.v(TAG, "error is", e);
// Error handling when your IP isn't found
return;
} catch(Exception e) {
// Error handling for any other errors
Log.v(TAG, "error is", e);
return;
}
/* The second part of the run() method loops infinitely and sends messages every 500
* milliseconds.
*/
while (true) {
if (oscPortOut != null) {
// Creating the message
Log.v(TAG, "CREATED MESSAGE");
Object[] thingsToSend = new Object[3];
thingsToSend[0] = "Hello World";
thingsToSend[1] = 12345;
thingsToSend[2] = 1.2345;
/* The version of JavaOSC from the Maven Repository is slightly different from the one
* from the download link on the main website at the time of writing this tutorial.
*
* The Maven Repository version (used here), takes a Collection, which is why we need
* Arrays.asList(thingsToSend).
*
* If you're using the downloadable version for some reason, you should switch the
* commented and uncommented lines for message below
*/
OSCMessage message = new OSCMessage(myIP, Arrays.asList(thingsToSend));
// OSCMessage message = new OSCMessage(myIP, thingsToSend);
/* NOTE: Since this version of JavaOSC uses Collections, we can actually use ArrayLists,
* or any other class that implements the Collection interface. The following code is
* valid for this version.
*
* The benefit of using an ArrayList is that you don't have to know how much information
* you are sending ahead of time. You can add things to the end of an ArrayList, but not
* to an Array.
*
* If you want to use this code with the downloadable version, you should switch the
* commented and uncommented lines for message2
*/
ArrayList<Object> moreThingsToSend = new ArrayList<Object>();
moreThingsToSend.add("Hello World2");
moreThingsToSend.add(123456);
moreThingsToSend.add(12.345);
OSCMessage message2 = new OSCMessage(myIP, moreThingsToSend);
//OSCMessage message2 = new OSCMessage(myIP, moreThingsToSend.toArray());
try {
// Send the messages
oscPortOut.send(message);
oscPortOut.send(message2);
Log.v(TAG, "SENDING");
// Pause for half a second
sleep(500);
} catch (Exception e) {
// Error handling for some error
}
}
}
}
};
我最終遇到了一些網絡錯誤,研究表明,我可能需要在Android.manifest
文件中添加以下權限行:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
但是,在添加了這些行並在Simulator(Nexus 7)上運行了該應用程序之后,我仍然收到錯誤消息,提示“該應用程序已停止”。
這實際上是我的第一個Android項目,因此我確定這里可能遺漏了一些明顯的內容(例如在發生崩潰時在哪里查找日志)。
編輯:我在API 27上。我從LogCat看到的唯一日志如下:
12-13 17:07:54.299 2981-3026/com.deviantdev.pdsampleproject D/EGL_emulation: eglMakeCurrent: 0xa9f842a0: ver 2 0 (tinfo 0xa9f83300)
12-13 17:07:55.344 2981-2981/com.deviantdev.pdsampleproject I/Choreographer: Skipped 103 frames! The application may be doing too much work on its main thread.
12-13 17:07:55.362 2981-3026/com.deviantdev.pdsampleproject D/EGL_emulation: eglMakeCurrent: 0xa9f842a0: ver 2 0 (tinfo 0xa9f83300)
[ 12-13 17:07:55.416 2981: 2981 D/ ]
PlayerBase::stop() from IPlayer
12-13 17:07:55.416 2981-2981/com.deviantdev.pdsampleproject D/AudioTrack: stop() called with 90720 frames delivered
12-13 17:07:55.432 2981-2981/com.deviantdev.pdsampleproject I/opensl_stream: Input buffer size estimate: 0
12-13 17:07:55.432 2981-2981/com.deviantdev.pdsampleproject I/opensl_stream: Output buffer size estimate: 0
12-13 17:07:55.432 2981-2981/com.deviantdev.pdsampleproject I/opensl_stream: Lowest margin: 11968
從Android Marshmallow(API 23)及更高版本開始,您可能需要實現Runtime Permission 。 這是一個例子,
if (Build.VERSION.SDK_INT >= 23) {
String[] PERMISSIONS = {android.Manifest.permission.WRITE_EXTERNAL_STORAGE};
if (!hasPermissions(mContext, PERMISSIONS)) {
ActivityCompat.requestPermissions((MainActivity) mContext, PERMISSIONS, REQUEST );
} else {
//do something
}
} else {
//do something
}
您可以在onCreate
內編寫此代碼,這是在運行時獲取WRITE_EXTERNAL_STORAGE
權限的示例。
我認為您應該修改此行
String[] PERMISSIONS = {android.Manifest.permission.WRITE_EXTERNAL_STORAGE};
至
String[] PERMISSIONS = {android.Manifest.permission.INTERNET,android.Manifest.permission.ACCESS_NETWORK_STATE,android.Manifest.permission.ACCESS_WIFI_STATE};
希望對您有所幫助。
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