问题描述

* What went wrong:
Execution failed for task ‘:app:processDebugManifest‘.
> Manifest merger failed : uses-sdk:minSdkVersion 8 cannot be smaller than version 9 declared in library D:\AndroidStudioProjects\StudioDemo\app\build\intermediates\exploded-aar\com.umeng\fb\5.1.0\AndroidManifest.xml
Suggestion: use tools:overrideLibrary="com.umeng.fb" to force usage

解决方法

在app的AndroidManifest.xml中做如下修改:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.studio.demo">

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="22"
        tools:overrideLibrary="com.umeng.fb" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme"
        >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

注意两个地方：

1. 在manifest节点加上：xmlns:tools="http://schemas.android.com/tools"

2. 在uses-sdk节点加上：tools:overrideLibrary="com.umeng.fb"

Reference

http://tools.android.com/tech-docs/new-build-system/user-guide/manifest-merger