我找到了relatively complex solution,using gradle script,其中涉及重新打包play-services.jar文件.此外,此解决方案需要明确指定不会使用的每个包.但我不明白为什么不能在我的案例中做这项工作呢？

的build.gradle：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.1"

    defaultConfig {
        minSdkVersion 10
        targetSdkVersion 21
    }

    buildTypes {
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'),'proguard-rules.pro'
        }
    }
}

dependencies {
    // !!! when I comment the line below,release APK is 700 KB smaller !!! //
    compile 'com.google.android.gms:play-services:6.5.87'
}

proguard-rules.pro：

-assumenosideeffects class android.util.Log {
    public static *** d(...);
}

AndroidManifest.xml中：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.test.noplayservices">
    <application android:allowBackup="true"
                 android:label="@string/app_name"
                 android:icon="@drawable/ic_launcher"
                 android:theme="@style/AppTheme">
        <activity android:name=".ui.activities.MainActivity" android:icon="@drawable/ic_launcher">
            <intent-filter>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>
</manifest>

MainActivity.java：

package com.test.noplayservices.ui.activities;

import android.app.Activity;
import android.os.Bundle;
import com.test.noplayservices.R;

public class MainActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstance) {
        super.onCreate(savedInstance);
        setContentView(R.layout.main_activity);
    }
}