我试图让Branch.io在Android上工作,但我遇到了以下情况:
myapplication.MainActivity cannot be cast to android.app.Application然后我改变了:
Branch.getAutoInstance(this);至:
Branch.getInstance();在onCreate中的活动。
然后我得到:
java.lang.NullPointerException: Attempt to invoke virtual method 'boolean io.branch.referral.Branch.initSession(io.branch.referral.Branch$BranchReferralInitListener, android.net.Uri, android.app.Activity)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)你能帮我启动基础设施吗?
以下是我的AndroidManifest.xml:(注意: branch_key是在我的应用程序代码中添加的)
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.x.myapplication">
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<meta-data android:name="io.branch.sdk.BranchKey" android:value="key_live_xxxxxxxxxxxxxxx" />
<activity android:name=".MainActivity">
<intent-filter>
<data android:scheme="yourapp" android:host="open" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name="io.branch.referral.InstallListener" android:exported="true">
<intent-filter>
<action android:name="com.android.vending.INSTALL_REFERRER" />
</intent-filter>
</receiver>
</application>
</manifest>我的主要活动:
package com.example.chg.myapplication;
import android.app.Activity;
import android.os.Bundle;
import android.content.Intent;
import android.util.Log;
import org.json.JSONObject;
import io.branch.referral.Branch;
import io.branch.referral.BranchError;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Branch.getAutoInstance(this);
Branch.getInstance();
setContentView(R.layout.activity_main);
}
@Override
public void onStart() {
super.onStart();
Branch branch = Branch.getInstance();
branch.initSession(new Branch.BranchReferralInitListener(){
@Override
public void onInitFinished(JSONObject referringParams, BranchError error) {
if (error == null) {
// params are the deep linked params associated with the link that the user clicked -> was re-directed to this app
// params will be empty if no data found
// ... insert custom logic here ...
} else {
Log.i("MyApp", error.getMessage());
}
}
}, this.getIntent().getData(), this);
}
@Override
public void onNewIntent(Intent intent) {
this.setIntent(intent);
}
}发布于 2016-05-27 21:23:00
Branch.io的亚历克斯在这里:
我们最近对我们的教程做了一些修改,看起来我们遗漏了一些东西。我很感谢你的帖子-我们将在今天晚些时候推动一个更新,以获得更多的清晰度。
在这种情况下,有两个问题:
onCreate()和Activity onCreate()方法之间的混淆,这两个方法实际上都不是基本实现所需要的。若要启动和运行,请按以下方式更新您的文件:
AndroidManifest.xml
你在这里有三个选择:
1.使用分支应用程序类(最简单)
如果您还没有定制的应用程序类,这是最简单的方法。将android:name="io.branch.referral.BranchApp"添加到Application类中:
编辑:根据下面的注释更新代码段
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.chg.appbranch_01">
<meta-data android:name="io.branch.sdk.BranchKey" android:value="xxx" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme"
android:name="io.branch.referral.BranchApp">
<!--Enable test mode to see debugging data
(https://dev.branch.io/getting-started/integration-testing/guide/android/#use-debug-mode-to-simulate-fresh-installs)-->
<meta-data android:name="io.branch.sdk.TestMode" android:value="true" />
<meta-data android:name="io.branch.sdk.BranchKey" android:value="key_live_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" />
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<data android:scheme="theapp" android:host="open" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
</intent-filter>
</activity>
<receiver android:name="io.branch.referral.InstallListener" android:exported="true">
<intent-filter>
<action android:name="com.android.vending.INSTALL_REFERRER" />
</intent-filter>
</receiver>
</application>
</manifest>2.用BranchApp类扩展应用程序类
如果您已经有一个自定义应用程序类,这是最简单的方法。您的AndroidManifext.xml文件将如下所示:
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme"
android:name="com.your.app.CustomApplicationClass" >您的自定义应用程序类(在上面的示例中为CustomApplicationClass)如下所示:
public final class CustomApplicationClass extends YourApp {
@Override
public void onCreate() {
super.onCreate();
}
}3.直接集成到自定义应用程序类中。
最自定义的方法,用于高级实现。您可以让您的AndroidManifext.xml文件设置与上面的相同:
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme"
android:name="com.your.app.CustomApplicationClass" >然后按照以下方式配置应用程序类:
public final class CustomApplicationClass {
@Override
public void onCreate() {
super.onCreate();
Branch.getAutoInstance(this);
}
}活动定义
删除onCreate()调用。这里不需要它们,实际上是错误消息的原因(Branch.getAutoInstance(this)将Activity上下文作为this传递,而SDK期望从上面的选项3获得应用程序上下文)。
import io.branch.referral.Branch;
import io.branch.referral.BranchError;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public void onStart() {
super.onStart();
Branch branch = Branch.getInstance();
branch.initSession(new Branch.BranchReferralInitListener(){
@Override
public void onInitFinished(JSONObject referringParams, BranchError error) {
if (error == null) {
// params are the deep linked params associated with the link that the user clicked -> was re-directed to this app
// params will be empty if no data found
// ... insert custom logic here ...
} else {
Log.i("MyApp", error.getMessage());
}
}
}, this.getIntent().getData(), this);
}
@Override
public void onNewIntent(Intent intent) {
this.setIntent(intent);
}
}很抱歉给您带来不便!
https://stackoverflow.com/questions/37482405
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