私はサードパーティのライブラリを使用していDrawableCompat.setTintMode(drawable, PorterDuff.Mode.SRC_IN);
ます。Android 5.0以降でアプリをテストすると、問題はなく、うまく機能しました.しかし、Android 4.4.4になると、例外がスローされました:
05-09 13:15:15.030 26447-26447/com.wizchen.athit E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.wizchen.athit, PID: 26447
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.wizchen.athit/com.wizchen.athit.view.activity.MainActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2271)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2320)
at android.app.ActivityThread.access$800(ActivityThread.java:138)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1269)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5117)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at android.support.v4.graphics.drawable.DrawableWrapperDonut.setCompatTintMode(DrawableWrapperDonut.java:278)
at android.support.v4.graphics.drawable.DrawableCompatBase.setTintMode(DrawableCompatBase.java:48)
at android.support.v4.graphics.drawable.DrawableCompat$BaseDrawableImpl.setTintMode(DrawableCompat.java:99)
at android.support.v4.graphics.drawable.DrawableCompat.setTintMode(DrawableCompat.java:400)
at com.wizchen.athit.lib.AppThemeEngine.util.TintHelper.createTintedDrawable(TintHelper.java:359)
at com.wizchen.athit.lib.AppThemeEngine.viewprocessors.ToolbarProcessor.process(ToolbarProcessor.java:117)
at com.wizchen.athit.lib.AppThemeEngine.viewprocessors.ToolbarProcessor.process(ToolbarProcessor.java:44)
at com.wizchen.athit.lib.AppThemeEngine.ATE.postApply(ATE.java:209)
at com.wizchen.athit.lib.AppThemeEngine.ATEActivity.onStart(ATEActivity.java:60)
at com.wizchen.athit.view.activity.MainActivity.onStart(MainActivity.java:68)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1183)
at android.app.Activity.performStart(Activity.java:5359)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2244)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2320)
at android.app.ActivityThread.access$800(ActivityThread.java:138)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1269)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5117)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
上記のスタック トレースを除いて、コンソールに次のようなエラー情報が表示されました。
05-09 13:15:15.030 26447-26447/com.wizchen.athit E/dalvikvm: Could not find class 'android.graphics.drawable.RippleDrawable', referenced from method com.wizchen.athit.lib.AppThemeEngine.util.TintHelper.setTintAuto
そしてこれ:
05-09 13:15:15.030 26447-26447/com.wizchen.athit E/dalvikvm: Could not find class 'android.graphics.drawable.RippleDrawable', referenced from method com.wizchen.athit.lib.AppThemeEngine.util.TintHelper.setTintSelector
もちろん、私は自分のプロジェクトで v4 サポート ライブラリをコンパイルしました :)
誰がこの問題に遭遇しましたか? 手伝ってくれてありがとう!
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更新 1:
これが NullPointerException の原因です:
@CheckResult
@Nullable
public static Drawable createTintedDrawable(@Nullable Drawable drawable, @ColorInt int color) {
if (drawable == null) return null;
drawable = DrawableCompat.wrap(drawable.mutate());
DrawableCompat.setTintMode(drawable, PorterDuff.Mode.SRC_IN);
DrawableCompat.setTint(drawable, color);
return drawable;
}