Android Http请求失败解决方法

1、MainActivity.java 文件中的onCreate方法改成如下：

@SuppressLint("NewApi")

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()

.detectDiskReads().detectDiskWrites().detectNetwork()

.penaltyLog().build());

StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()

.detectLeakedSqlLiteObjects().penaltyLog().penaltyDeath()

}

2、AndroidManifest.xml 里面的manifest加入配置

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

 <uses-permission android:name="android.permission.INTERNET" />