[英]Nexus 7 Opening a Socket at android api lvl 16 and 17 gives crash?
I have file sender code which works on api lvl 8 and 9. But when i changed the target-api lvl as 16 or 17 it gives error and program closes directly. 我有适用于api lvl 8和9的文件发送器代码。但是,当我将target-api lvl更改为16或17时,它给出了错误,程序直接关闭。 When i remove <"android:targetSdkVersion=.."> property it works.
当我删除<“ android:targetSdkVersion = ..”>属性时,它可以工作。 But i need to write that property as 16 or 17 lvl.
但我需要将该属性写为16或17 lvl。 I need to work 16 or 17 api lvls.
我需要工作16或17个API。 (My nexus 7 version 4.2.2 (api lvl 17) and i will use some 16/17 api lvl properties for usb applications)
(我的nexus 7版本4.2.2(api lvl 17),我将为USB应用程序使用一些16/17 api lvl属性)
Here is the working send file code: 这是有效的发送文件代码:
SendButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
try {
Socket sock = new Socket("192.168.2.7",5656);
File myFile = new File ("/mnt/sdcard/TEST/TEST.xml");
byte [] mybytearray = new byte [(int)myFile.length()];
FileInputStream fis = new FileInputStream(myFile);
BufferedInputStream bis = new BufferedInputStream(fis);
bis.read(mybytearray,0,mybytearray.length);
OutputStream os = sock.getOutputStream();
os.write(mybytearray,0,mybytearray.length);
os.flush();
sock.close();
}
catch (IOException e) {
}
}
});
Here is the my Android Manifest file versions and permissions: 这是我的Android清单文件的版本和权限:
android:minSdkVersion="8"
android:targetSdkVersion="8" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
Code works like that. 代码就是这样。 But i need to change android:targetSdkVersion="16 or 17".
但是我需要更改android:targetSdkVersion =“ 16或17”。
Any idea solution about that problem and how can i fix it for my Nexus7 ? 关于该问题的任何创意解决方案,如何为Nexus7修复?
Because if you handle the data from Network in UI Thread with higher version API, it will throw an exception(NetworkOnMainThreadException). 因为如果您使用更高版本的API在UI线程中处理来自网络的数据,则它将引发异常(NetworkOnMainThreadException)。 So you have to handle the network data in work thread:
因此,您必须在工作线程中处理网络数据:
public void onClick(View v) {
new Thread(new Runnable() {
public void run() {
try {
Socket sock = new Socket("192.168.2.7",5656);
File myFile = new File ("/mnt/sdcard/TEST/TEST.xml");
byte [] mybytearray = new byte [(int)myFile.length()];
FileInputStream fis = new FileInputStream(myFile);
BufferedInputStream bis = new BufferedInputStream(fis);
bis.read(mybytearray,0,mybytearray.length);
OutputStream os = sock.getOutputStream();
os.write(mybytearray,0,mybytearray.length);
os.flush();
sock.close();
}catch (IOException e) {
}
}
}).start();
}
You can see more detail in http://developer.android.com/reference/android/os/NetworkOnMainThreadException.html 您可以在http://developer.android.com/reference/android/os/NetworkOnMainThreadException.html中查看更多详细信息
it was added in API 11. 它是在API 11中添加的。
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