java - MultiDex 应用程序 Android

Question

今天我遇到了这样的错误:

Error:The number of method references in a .dex file cannot exceed 64K.
Learn how to resolve this issue at https://developer.android.com/tools/building/multidex.html

我在我的 build.gradle 中写:

multiDexEnabled true

和

dependencies {
  compile 'com.android.support:multidex:1.0.1'
}

在我的 list 中:

android:name="android.support.multidex.MultiDexApplication"

在我的主要方法中:

public class myMethode extends AppCompatActivity{
@Override
protected void attachBaseContext(Context base) {
 super.attachBaseContext(base);
 MultiDex.install(this);
}
}

但是我收到这些错误:

03-15 12:15:37.066 19676-19676/de.example E/AndroidRuntime: FATAL EXCEPTION: main
03-15 12:15:37.066 19676-19676/de.example E/AndroidRuntime: Process: de.imatics.mediplan, PID: 19676
03-15 12:15:37.066 19676-19676/de.example E/AndroidRuntime: java.lang.RuntimeException: Unable to resume activity {de.imatics.mediplan/de.example.MedicationScheduleActivity}: java.lang.NullPointerException

Answer 1

在android下的build.gradle中exclude meta info like

packagingOptions {
        exclude 'META-INF/DEPENDENCIES.txt'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/notice.txt'
        exclude 'META-INF/license.txt'
        exclude 'META-INF/dependencies.txt'
        exclude 'META-INF/LGPL2.1'
    }

还有 MultiDex.install(this); 应该写在 Application 类中，像 Application 类一样扩展

public class MyApp extends Application {

    @Override
    protected void attachBaseContext(Context base) {
        super.attachBaseContext(base);
        MultiDex.install(this);
    }
}