安装了Firebase的AndroidStudio无效

我正在尝试使用Firebase创建一个使者.

然后android studio给了我一个错误.任务':app:dexDebug'的执行失败.

这是错误:

Execution failed for task ':app:dexDebug'.

com.android.ide.common.internal.LoggedErrorException:无法运行命令:C:\ Users\***\AppData\Local\Android\sdk\build-tools\21.1.2\dx.bat --dex - no-optimize --output C:\ Users\***\AndroidStudioProjects\TheMessenger\app\build\intermediates\dex\debug --input-list = C:\ Users\***\AndroidStudioProjects\TheMessenger\app\build\intermediates\tmp\dex\debug\inputList.txt错误代码:2输出:

UNEXPECTED TOP-LEVEL EXCEPTION:
com.android.dex.DexException: Multiple dex files define Lcom/firebase/client/AuthData;
    at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:596)
    at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:554)
    at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:535)
    at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:171)
    at com.android.dx.merge.DexMerger.merge(DexMerger.java:189)
    at com.android.dx.command.dexer.Main.mergeLibraryDexBuffers(Main.java:454)
    at com.android.dx.command.dexer.Main.runMonoDex(Main.java:303)
    at com.android.dx.command.dexer.Main.run(Main.java:246)
    at com.android.dx.command.dexer.Main.main(Main.java:215)
    at com.android.dx.command.Main.main(Main.java:106)

这是我的Build.gradle:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.2"

defaultConfig {
    applicationId "joel.themessenger"
    minSdkVersion 12
    targetSdkVersion 21
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

packagingOptions {
    exclude 'META-INF/LICENSE'
    exclude 'META-INF/LICENSE-FIREBASE.txt'
    exclude 'META-INF/NOTICE'
}
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:21.0.3'
    compile 'com.firebase:firebase-client-android:2.1.2+'
}

我的主要活动:

public class MainActivity extends ActionBarActivity {


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Firebase.setAndroidContext(this);
}

Firebase myFirebaseRef = new Firebase("https://intense-inferno-9606.firebaseio.com/");
EditText messageInput = (EditText)findViewById(R.id.messageEdit);
String message;
String name = "Joël";

public void sendMessage(View v) {
    message = messageInput.getText().toString();
    Map post = new HashMap();
    post.put("name", name);
    post.put("text", message);
    myFirebaseRef.push().setValue(post);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}
}

我将Jar文件保存在app/libs/firebase-client-android-2.1.2.jar文件夹中

我得到了Android-Manifest.

提前致谢!

解:

我包括com.firebase.client.AuthData两次,我不得不删除jar文件和build.gradle中的依赖项就足够了.但现在我又得到了另一个错误!

java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{joel.themessenger/joel.themessenger.MainActivity}: java.lang.RuntimeException: You need to set the Android context using Firebase.setAndroidContext() before using Firebase.

虽然我在我的主要活动中实例化了它.有帮助吗？

我不得不在Firebase.setAndroidContext(this);其他地方使用.你将不得不创建一个看起来像这样的新java文件

 import com.firebase.client.Firebase;

    public class MessengerApplication extends android.app.Application {

        @Override
        public void onCreate() {
            super.onCreate();
            Firebase.setAndroidContext(this);
        }
    }

然后你将不得不编辑androidManifest.你必须添加android:name="."

此错误意味着您已将com.firebase.client.AuthData该类包含在项目中两次,但您不允许这样做.根据您的描述,一份副本来自:

compile 'com.firebase:firebase-client-android:2.1.2+'

另一个来自:

我将Jar文件保存在app/libs/firebase-client-android-2.1.2.jar文件夹中

我建议从libs文件夹中删除jar,只需在构建脚本中使用该语句; 这使得维护更容易.