您必须在MainActivity类上插入两行“ StrictMode”，示例如下：

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);

        try {
            // JSON here
        } catch (JSONException e2) {
            // TODO Auto-generated catch block
            e2.printStackTrace();
        }
        catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


        setContentView(R.layout.activity_main);
        Intent intent=new Intent(this,HomeActivity.class);
        startActivity(intent);
    }
}

艾克·萨康