安卓应用程序快捷方式打破较低的Android版本

Question

今天，我正在使用最新的Android 7.1功能应用程序快捷方式进行应用程序。起初，它在Android 7.1.1上运行良好。但是，当我在Android M上运行MIUI 8时，它不幸遇到了问题。我写了一些东西让它在M或更低的版本上运行，但它又一次崩溃了。我很困惑。我希望有人能为我解决这个问题。如果有人能帮助我，我将不胜感激。不管怎么说，还是要谢谢你！

这是我的代码。

findViewById(R.id.textView5).setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      addshortcut(); 
     } 
    }); 
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { 
     shortcutManager = getSystemService(ShortcutManager.class); 
    } 


public void addshortcut(){ 
    TextView textView = (TextView)findViewById(R.id.textView5); 
    String name = textView.getText().toString(); 
    ShortcutInfo dynamicShortcut = null; 
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N_MR1) { 
     dynamicShortcut = new ShortcutInfo.Builder(this, "shortcut_dynamic-zty") 
       .setShortLabel(name) 
       .setLongLabel(name) 
       .setIcon(Icon.createWithResource(this,R.drawable.ic_account_circle)) 
       .setIntents(
         new Intent[]{ 
           new Intent(Intent.ACTION_VIEW, Uri.EMPTY,com.zengtianyu.gallery1.DetailZTY.this, DetailZTY.class).setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK), 
         }) 
       .build(); 
    } 
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N_MR1) { 
     shortcutManager.setDynamicShortcuts(Arrays.asList(dynamicShortcut)); 
    } 
    Toast.makeText(this,"添加成功",Toast.LENGTH_SHORT).show(); 
} 

这是日志。

java.lang.NoClassDefFoundError: Failed resolution of:Landroid/content/pm/ShortcutManager; 
at com.zengtianyu.gallery1.DetailLSW.onCreate(DetailLSW.java:88) 
at android.app.Activity.performCreate(Activity.java:6323) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2411) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2518) 
at android.app.ActivityThread.access$1000(ActivityThread.java:153) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1382) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:154) 
at android.app.ActivityThread.main(ActivityThread.java:5544) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629) 
at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:102) 
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.content.pm.ShortcutManager" on path: DexPathList[[zip file "/data/app/com.zengtianyu.gallery1-1/base.apk"],nativeLibraryDirectories=[/data/app/com.zengtianyu.gallery1-1/lib/arm64, /vendor/lib64, /system/lib64]] 
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:511) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:469) 
... 14 more 
Suppressed: java.lang.ClassNotFoundException: Didn't find class "android.content.pm.ShortcutManager" on path: DexPathList[[dex file "/data/dalvik-cache/xposed_XResourcesSuperClass.dex"],nativeLibraryDirectories=[/vendor/lib64, /system/lib64]] 
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:511) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:504) 
... 15 more 
Suppressed: java.lang.ClassNotFoundException:android.content.pm.ShortcutManager 
    at java.lang.Class.classForName(Native Method) 
    at java.lang.BootClassLoader.findClass(ClassLoader.java:781) 
    at java.lang.BootClassLoader.loadClass(ClassLoader.java:841) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:504) 
    ... 16 more 
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available 

Answer 1

你传入ShortcutManager.class而不是字符串常量SHORTCUT_SERVICE 变更线8以下几点：

shortcutManager = (ShortcutManager)getSystemService(SHORTCUT_SERVICE); 

如果你想支持较旧的Android版本，不要让shortcutManager一个全局变量，而是在addShortcut（）函数中创建它，并在第7行中将函数的使用封装在sdk版本检查中012因此，您应该以：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { 
    addShortcut(); 
} 
... 
public void addShortcut(){ 
    ShortcutManager shortcutManager = (ShortcutManager)getSystemService(SHORTCUT_SERVICE); 
    ... 
}