将 branch.io sdk 与 android app 集成，得到 classcastexception
integerating branch.io sdk with android app , getting classcasteException
我遵循了 Branch.io
上的所有说明
https://start.branch.io/#/ << 已执行此 link 中的所有步骤。 （我应该使用哪个键.. test_branch_key 或 live_branch_key ??两者有什么区别）
这是我的MainActivity.java文件
package absdevelopers.com.finalbranchtest;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import org.json.JSONObject;
import io.branch.referral.Branch;
import io.branch.referral.BranchError;
public class MainActivity extends AppCompatActivity {
@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 before showing up
Log.i("BranchConfigTest", "deep link data: " + referringParams.toString());
}
}
}, this.getIntent().getData(), this);
}
@Override
public void onNewIntent(Intent intent) {
this.setIntent(intent);
}
}
这是我的activity_main.xml文件
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="absdevelopers.com.finalbranchtest.MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!" />
</RelativeLayout>
这是我的 AndroidManifest.xml 文件：
<?xml version="1.0" encoding="utf-8"?>
<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">
<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="finalbranchtest" 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>
<meta-data android:name="io.branch.sdk.BranchKey" android:value="key_live_icb6ztmzyA8s5fhGYkqpNipjrEiiUc7F" />
</application>
LOGCAT
03-17 14:24:38.407 30232-30232/? I/art: Late-enabling -Xcheck:jni
03-17 14:24:38.434 30232-30242/? E/art: Failed sending reply to debugger: Broken pipe
03-17 14:24:38.434 30232-30242/? I/art: Debugger is no longer active
03-17 14:24:38.539 30232-30232/? E/BranchSDK: Branch instance is not created yet. Make sure you have initialised Branch. [Consider Calling getInstance(Context ctx) if you still have issue.]
03-17 14:24:38.539 30232-30232/? D/AndroidRuntime: Shutting down VM
03-17 14:24:38.540 30232-30232/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: absdevelopers.com.finalbranchtest, PID: 30232
java.lang.RuntimeException: Unable to start activity ComponentInfo{absdevelopers.com.finalbranchtest/absdevelopers.com.finalbranchtes t.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean io.branch.referral.Branch.initSession(io.branch.referral.Branch$BranchReferralIn itListener, android.net.Uri, android.app.Activity)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access0(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean io.branch.referral.Branch.initSession(io.branch.referral.Branch$BranchReferralInitListener, android.net.Uri, android.app.Activity)' on a null object reference
at absdevelopers.com.finalbranchtest.MainActivity.onStart(MainActivity.java:25)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1220)
at android.app.Activity.performStart(Activity.java:5949)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2261)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access0(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
03-17 14:29:38.617 30232-30232/? I/Process: Sending signal. PID: 30232 SIG: 9
以下是有关 Live 和 Test 键之间区别的信息：https://dev.branch.io/getting-started/integration-testing/guide/ios/#the-test-sandbox-environment
总而言之，您可以将这些视为 Branch 系统中的独立应用程序，为方便起见，可以从同一仪表板简单地访问这些应用程序。没有数据交叉，两者都提供相同的配置选项，并且您使用不同的 Branch 密钥来访问每个选项。链接遵循在其下创建的 Branch 密钥的配置设置。
我得到了问题的解决方案..
改变
Branch branch = Branch.getInstance();
至
Branch branch = Branch.getInstance(getApplicationContext());
在 .java 文件中
我遵循了 Branch.io
上的所有说明https://start.branch.io/#/ << 已执行此 link 中的所有步骤。 （我应该使用哪个键.. test_branch_key 或 live_branch_key ??两者有什么区别）
这是我的MainActivity.java文件
package absdevelopers.com.finalbranchtest;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import org.json.JSONObject;
import io.branch.referral.Branch;
import io.branch.referral.BranchError;
public class MainActivity extends AppCompatActivity {
@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 before showing up
Log.i("BranchConfigTest", "deep link data: " + referringParams.toString());
}
}
}, this.getIntent().getData(), this);
}
@Override
public void onNewIntent(Intent intent) {
this.setIntent(intent);
}
}
这是我的activity_main.xml文件
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="absdevelopers.com.finalbranchtest.MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!" />
</RelativeLayout>
这是我的 AndroidManifest.xml 文件：
<?xml version="1.0" encoding="utf-8"?>
<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">
<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="finalbranchtest" 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>
<meta-data android:name="io.branch.sdk.BranchKey" android:value="key_live_icb6ztmzyA8s5fhGYkqpNipjrEiiUc7F" />
</application>
LOGCAT
03-17 14:24:38.407 30232-30232/? I/art: Late-enabling -Xcheck:jni
03-17 14:24:38.434 30232-30242/? E/art: Failed sending reply to debugger: Broken pipe
03-17 14:24:38.434 30232-30242/? I/art: Debugger is no longer active
03-17 14:24:38.539 30232-30232/? E/BranchSDK: Branch instance is not created yet. Make sure you have initialised Branch. [Consider Calling getInstance(Context ctx) if you still have issue.]
03-17 14:24:38.539 30232-30232/? D/AndroidRuntime: Shutting down VM
03-17 14:24:38.540 30232-30232/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: absdevelopers.com.finalbranchtest, PID: 30232
java.lang.RuntimeException: Unable to start activity ComponentInfo{absdevelopers.com.finalbranchtest/absdevelopers.com.finalbranchtes t.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean io.branch.referral.Branch.initSession(io.branch.referral.Branch$BranchReferralIn itListener, android.net.Uri, android.app.Activity)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access0(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean io.branch.referral.Branch.initSession(io.branch.referral.Branch$BranchReferralInitListener, android.net.Uri, android.app.Activity)' on a null object reference
at absdevelopers.com.finalbranchtest.MainActivity.onStart(MainActivity.java:25)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1220)
at android.app.Activity.performStart(Activity.java:5949)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2261)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access0(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
03-17 14:29:38.617 30232-30232/? I/Process: Sending signal. PID: 30232 SIG: 9
以下是有关 Live 和 Test 键之间区别的信息：https://dev.branch.io/getting-started/integration-testing/guide/ios/#the-test-sandbox-environment
总而言之，您可以将这些视为 Branch 系统中的独立应用程序，为方便起见，可以从同一仪表板简单地访问这些应用程序。没有数据交叉，两者都提供相同的配置选项，并且您使用不同的 Branch 密钥来访问每个选项。链接遵循在其下创建的 Branch 密钥的配置设置。
我得到了问题的解决方案..
改变
Branch branch = Branch.getInstance();
至
Branch branch = Branch.getInstance(getApplicationContext());
在 .java 文件中