小编A7m*_*dev的帖子

我在简单的地图应用程序上工作,我添加了google-play-services.jar及其对gradle的引用

dependencies {
    compile files('libs/android-support-v4.jar', 'libs/google-play-services.jar')
}

主要活动:

setContentView(R.layout.activity_mapui);

GoogleMap map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();

布局文件

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/map"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:name="com.google.android.gms.maps.MapFragment"/>

但该应用程序在设备上崩溃了

E/AndroidRuntime:FATAL EXCEPTION:主要java.lang.NoClassDefFoundError:com.google.android.gms.R $可在com.google.android上的com.google.android.gms.maps.GoogleMapOptions.createFromAttributes(未知来源)设置样式. gms.maps.MapFragment.onInflate(未知来源)

我试过几种方法,同样的问题,我只是想用Gradle 0.6+将谷歌服务添加到Android Studio 0.3

我在使用appcompat.v7之前在Actionbar中实现了SearchView,但是当我想将SearchView与支持库v7一起使用时,它显示了null异常

很有型

<item android:id="@+id/action_search"
    android:title="@string/action_search"
    android:icon="@drawable/ic_action_search"
    app:showAsAction="always|collapseActionView"
    android:actionViewClass="android.support.v7.widget.SearchView" />

在Java类中:

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.menu, menu);
    SearchView searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();
    searchView.setOnQueryTextListener(this);
    return super.onCreateOptionsMenu(menu);
}

我的问题是如何在onCreateOptionsMenu中声明SearchView以便能够设置查询侦听器？

Restkit映射和插入数据工作正常,但我需要向数据库添加自定义值(而不是从JSON)

RKEntityMapping *entityMapping = [RKEntityMapping mappingForEntityForName:entityName inManagedObjectStore:managedObjectStore];

[entityMapping addAttributeMappingsFromDictionary:dict];

if (uniqKey != nil) {
    entityMapping.identificationAttributes = @[ uniqKey ];
}

// Set MIME Type to JSON
manager.requestSerializationMIMEType = RKMIMETypeJSON;

// register mappings with the provider using a response descriptor
RKResponseDescriptor *responseDescriptor =
[RKResponseDescriptor responseDescriptorWithMapping:entityMapping
                                             method:RKRequestMethodPOST
                                        pathPattern:path
                                            keyPath:rootKeyPath
                                        statusCodes:[NSIndexSet indexSetWithIndex:200]];

[manager addResponseDescriptor:responseDescriptor];

[manager postObject:nil path:path parameters:queryParams success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
if (mappingResult.array.count != 0) {
    NSDictionary *data = mappingResult.array[0];       
    NSLog(@"data: %@", data);      
}else{
    NSLog(@"Unable to fetch data from: %@", path); …

我收到此错误错误:无法在Android Studio 0.9.3中初始化类javax.crypto.JceSecurity,任何解决方案？