Question

当我打开严格模式检测全部时，我的应用程序崩溃应用程序的super.onCreate（）（即使我的任何代码做任何事情之前）。

我的申请onCreate打开严格模式如下

override fun onCreate() {
    if (BuildConfig.DEBUG) {
        StrictMode.setThreadPolicy(
                StrictMode.ThreadPolicy.Builder()
                        .detectAll()
                        .penaltyLog()
                        .penaltyDeath().build())
        StrictMode.setVmPolicy(
                StrictMode.VmPolicy.Builder()
                        .detectAll()
                        .penaltyLog()
                        .penaltyDeath().build())
    }
    super.onCreate()

    // Some other code
}

我得到的错误（位于super.onCreate()）

D/StrictMode: StrictMode policy violation; ~duration=98 ms: android.os.StrictMode$StrictModeDiskReadViolation: policy=327711 violation=2
                                                             at android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1263)
                                                             at libcore.io.BlockGuardOs.open(BlockGuardOs.java:182)
                                                             at libcore.io.IoBridge.open(IoBridge.java:438)
                                                             at java.io.FileInputStream.<init>(FileInputStream.java:76)
                                                             at android.graphics.Typeface.getFullFlipFont(Typeface.java:584)
                                                             at android.graphics.Typeface.getFontPathFlipFont(Typeface.java:532)
                                                             at android.graphics.Typeface.SetFlipFonts(Typeface.java:719)
                                                             at android.graphics.Typeface.SetAppTypeFace(Typeface.java:846)
                                                             at android.app.Application.onCreate(Application.java:110)
                                                             at com.mypackage.MyApplication.onCreate(MyApplication.kt:40)

这是我们应该忽略的预期错误，还是我们应该解决这个问题？

Answer 1

显然错误是特定于设备的。它发生在三星S7上，但不是Nexus 6P。因此，这不是我要修的东西。因此，压制它的最好方法。

下面是我如何抑制它的例子。您可以将这些函数包装到Util类中。

override fun onCreate() {
    turnOnStrictMode()
    permitDiskReads{
        super.onCreate()
    }

    // Some other code
}


fun turnOnStrictMode() {
    if (BuildConfig.DEBUG) {
        StrictMode.setThreadPolicy(
                StrictMode.ThreadPolicy.Builder()
                        .detectAll()
                        .penaltyLog()
                        .penaltyDeath().build())
        StrictMode.setVmPolicy(
                StrictMode.VmPolicy.Builder()
                        .detectAll()
                        .penaltyLog()
                        .penaltyDeath().build())
    }
}

fun permitDiskReads(func: () -> Any) : Any {
    if (BuildConfig.DEBUG) {
        val oldThreadPolicy = StrictMode.getThreadPolicy()
        StrictMode.setThreadPolicy(
                StrictMode.ThreadPolicy.Builder(oldThreadPolicy)
                .permitDiskReads().build())
        val anyValue = func()
        StrictMode.setThreadPolicy(oldThreadPolicy)

        return anyValue
    } else {
        return func()
    }
}

请参阅to this了解更多详情。

Answer 2

将语句“ super.onCreate（）”移动到onCreate（）的StrictMode方法之前。查看本文以了解详细信息。 Walk through hell with Android StrictMode

Answer 3

这是我的Java版本

public class StrictModeManager {

private static boolean enabled = false;

private StrictModeManager() {}

public static void enableStrictMode() {
    enabled = true;
    StrictMode.ThreadPolicy.Builder threadPolicyBuilder = new StrictMode.ThreadPolicy.Builder()
            .detectDiskReads()
            .detectDiskWrites()
            .detectNetwork()
            .penaltyLog()
            .penaltyDropBox();

    StrictMode.VmPolicy.Builder vmPolicyBuilder = new StrictMode.VmPolicy.Builder()
            .detectLeakedSqlLiteObjects()
            .detectLeakedClosableObjects()
            .detectLeakedRegistrationObjects()
            .penaltyLog()
            .penaltyDropBox()
            .penaltyDeath();

    StrictMode.setThreadPolicy(threadPolicyBuilder.build());
    StrictMode.setVmPolicy(vmPolicyBuilder.build());

}

public static void allowDiskReads(Runnable runnable) {
    StrictMode.ThreadPolicy oldThreadPolicy = null;
    if (enabled) {
        oldThreadPolicy = StrictMode.getThreadPolicy();
        StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder(oldThreadPolicy).permitDiskReads().build());
    }
    runnable.run();
    if (oldThreadPolicy != null) StrictMode.setThreadPolicy(oldThreadPolicy);
   }
}

并使用它：

@Override
public void onCreate() {
    if (BuildConfig.DEBUG) StrictModeManager.enableStrictMode();
    StrictModeManager.allowDiskReads(App.super::onCreate);

    // Code here
}

StrictMode策略违规：android.os.StrictMode $ StrictModeDiskReadViolation：policy = 327711 violation = 2 at Application super.onCreate

3 个答案: