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Commit265c803

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author
lanxiaobin
committed
今日头条 MultiDex 启动优化
0 parents  commit265c803

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35 files changed

+1009
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lines changed

35 files changed

+1009
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lines changed

‎.gitignore

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*.iml
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.gradle
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/local.properties
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/.idea/caches
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/.idea/libraries
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/.idea/modules.xml
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/.idea/workspace.xml
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/.idea/navEditor.xml
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/.idea/assetWizardSettings.xml
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.DS_Store
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/build
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/captures
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.externalNativeBuild
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.cxx

‎app/build.gradle

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applyplugin:'com.android.application'
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android {
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compileSdkVersion 28
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defaultConfig {
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applicationId"com.lanshifu.multidextest"
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minSdkVersion15
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targetSdkVersion28
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versionCode1
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versionName"1.0"
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testInstrumentationRunner"androidx.test.runner.AndroidJUnitRunner"
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defaultConfig {
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//分包1,指定某个类在maindex，例如LeakCanary启动的时候会初始化一个ContentProvider
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multiDexEnabledtrue
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multiDexKeepProguard file('multiDexKeep.pro')// 打包到main dex的这些类的混淆规制，没特殊需求就给个空文件
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multiDexKeepFile file('maindexlist.txt')// keep specific classes
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}
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}
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buildTypes {
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release {
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minifyEnabledfalse
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proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'),'proguard-rules.pro'
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}
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}
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}
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dependencies {
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implementation fileTree(dir:'libs',include: ['*.jar'])
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implementation'androidx.appcompat:appcompat:1.0.2'
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implementation'androidx.constraintlayout:constraintlayout:1.1.3'
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testImplementation'junit:junit:4.12'
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androidTestImplementation'androidx.test:runner:1.1.1'
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androidTestImplementation'androidx.test.espresso:espresso-core:3.1.1'
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implementation'androidx.multidex:multidex:2.0.0'
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}

‎app/maindexlist.txt

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com/lanshifu/launchtest/LoadMultiDexActivity.class

‎app/multiDexKeep.pro

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‎app/proguard-rules.pro

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# Add project specific ProGuard rules here.
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# You can control the set of applied configuration files using the
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# proguardFiles setting in build.gradle.
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#
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# For more details, see
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# http://developer.android.com/guide/developing/tools/proguard.html
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# If your project uses WebView with JS, uncomment the following
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# and specify the fully qualified class name to the JavaScript interface
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# class:
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#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
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# public *;
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#}
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# Uncomment this to preserve the line number information for
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# debugging stack traces.
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#-keepattributes SourceFile,LineNumberTable
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# If you keep the line number information, uncomment this to
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# hide the original source file name.
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#-renamesourcefileattribute SourceFile

‎app/src/main/AndroidManifest.xml

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<?xml version="1.0" encoding="utf-8"?>
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<manifestxmlns:android="http://schemas.android.com/apk/res/android"
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package="com.lanshifu.launchtest">
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<application
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android:name="com.lanshifu.launchtest.MyApplication"
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android:allowBackup="true"
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android:icon="@mipmap/ic_launcher"
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android:label="@string/app_name"
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android:roundIcon="@mipmap/ic_launcher_round"
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android:supportsRtl="true"
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android:theme="@style/AppThemeWelcome">
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<activityandroid:name="com.lanshifu.launchtest.LoadMultiDexActivity"
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android:process=":multi_dex"
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android:launchMode="singleTask"
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android:excludeFromRecents="true"
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></activity>
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<activityandroid:name="com.lanshifu.launchtest.MainActivity" />
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<activityandroid:name="com.lanshifu.launchtest.SplashActivity">
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<intent-filter>
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<actionandroid:name="android.intent.action.MAIN" />
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<categoryandroid:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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</application>
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</manifest>
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packagecom.lanshifu.launchtest;
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importandroid.app.Activity;
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importandroid.app.AlertDialog;
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importandroid.content.Context;
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importandroid.os.Bundle;
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importandroid.os.Process;
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importandroid.util.Log;
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importandroidx.multidex.MultiDex;
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importjava.io.File;
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publicclassLoadMultiDexActivityextendsActivity {
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privatestaticfinalStringTAG ="lxb-LoadMultiDexActivity";
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@Override
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protectedvoidonCreate(BundlesavedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_load_multi_dex);
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Threadthread =newThread() {
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@Override
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publicvoidrun() {
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loadMultiDex();
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}
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};
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thread.setName("multi_dex");
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thread.start();
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showLoadingDialog();
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}
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privatevoidloadMultiDex(){
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Log.d(TAG,"MultiDex.install 开始: ");
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longstartTime =System.currentTimeMillis();
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MultiDex.install(LoadMultiDexActivity.this);
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Log.d(TAG,"MultiDex.install 结束，耗时: " + (System.currentTimeMillis() -startTime));
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try {
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//模拟MultiDex耗时很久的情况
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Thread.sleep(3000);
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}catch (InterruptedExceptione) {
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e.printStackTrace();
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}
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aftetMultiDex();
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}
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privatevoidaftetMultiDex() {
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deleteTempFile(this);
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//将这个进程杀死
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Log.d(TAG,"aftetMultiDex: ");
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finish();
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Process.killProcess(Process.myPid());
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}
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privatevoiddeleteTempFile(Contextcontext) {
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try {
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Filefile =newFile(context.getCacheDir().getAbsolutePath(),"load_dex.tmp");
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if (file.exists()) {
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file.delete();
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Log.d(TAG,"deleteTempFile: ");
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}
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}catch (Throwableth) {
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th.printStackTrace();
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}
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}
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privatevoidshowLoadingDialog(){
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newAlertDialog.Builder(this)
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.setMessage("加载中，请稍后...")
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.show();
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}
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}
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packagecom.lanshifu.launchtest;
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importandroidx.appcompat.app.AppCompatActivity;
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importandroid.os.Bundle;
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publicclassMainActivityextendsAppCompatActivity {
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@Override
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protectedvoidonCreate(BundlesavedInstanceState) {
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setTheme(R.style.AppTheme);
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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setTitle("主页");
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}
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}
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packagecom.lanshifu.launchtest;
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importandroid.app.Application;
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importandroid.content.Context;
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importandroid.content.Intent;
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importandroid.util.Log;
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importandroidx.multidex.MultiDex;
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importcom.lanshifu.launchtest.ustils.SystemUtil;
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importjava.io.File;
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publicclassMyApplicationextendsApplication {
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privatestaticfinalStringTAG ="lxb-MyApplication";
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@Override
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protectedvoidattachBaseContext(Contextbase) {
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super.attachBaseContext(base);
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Log.d(TAG,"attachBaseContext-getPackageName: " +base.getPackageName());
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Log.d(TAG,"attachBaseContext-getProcessName: " +SystemUtil.getProcessName(base));
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booleanisMainProcess =isMainProcess(base);
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Log.d(TAG,"attachBaseContext-isMainProcess: " +isMainProcess);
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//主进程并且vm不支持多dex的情况下才使用 MultiDex
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if (isMainProcess && !SystemUtil.isVMMultidexCapable()){
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loadMultiDex(base);
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}
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}
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privatebooleanisMainProcess(Contextcontext) {
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returncontext.getPackageName().equals(SystemUtil.getProcessName(context));
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}
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@Override
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publicvoidonCreate() {
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super.onCreate();
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if (!isMainProcess(this)){
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Log.d(TAG,"onCreate: 非主进程，return");
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return;
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}
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Log.d(TAG,"主进程 onCreate: 一些初始化操作");
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}
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privatevoidloadMultiDex(Contextcontext) {
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newTempFile(context);//创建临时文件
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//启动另一个进程去加载MultiDex
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Intentintent =newIntent(context,LoadMultiDexActivity.class);
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intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
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context.startActivity(intent);
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//检查MultiDex是否安装完（安装完会删除临时文件）
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checkUntilLoadDexSuccess(context);
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//另一个进程以及加载 MultiDex，有缓存了，所以主进程再加载就很快了。
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//为什么主进程要再加载，因为每个进程都有一个ClassLoader
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longstartTime =System.currentTimeMillis();
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MultiDex.install(context);
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Log.d(TAG,"第二次 MultiDex.install 结束，耗时: " + (System.currentTimeMillis() -startTime));
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}
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//创建一个临时文件，MultiDex install 成功后删除
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privatevoidnewTempFile(Contextcontext) {
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try {
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Filefile =newFile(context.getCacheDir().getAbsolutePath(),"load_dex.tmp");
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if (!file.exists()) {
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Log.d(TAG,"newTempFile: ");
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file.createNewFile();
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}
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}catch (Throwableth) {
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th.printStackTrace();
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}
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}
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/**
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* 检查MultiDex是否安装完,通过判断临时文件是否被删除
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* @param context
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* @return
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*/
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privatevoidcheckUntilLoadDexSuccess(Contextcontext) {
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Filefile =newFile(context.getCacheDir().getAbsolutePath(),"load_dex.tmp");
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inti =0;
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intwaitTime =100;//睡眠时间
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try {
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Log.d(TAG,"checkUntilLoadDexSuccess: >>> ");
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while (file.exists()) {
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Thread.sleep(waitTime);
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Log.d(TAG,"checkUntilLoadDexSuccess: sleep count = " + ++i);
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if (i >40) {
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Log.d(TAG,"checkUntilLoadDexSuccess: 超时，等待时间： " + (waitTime *i));
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break;
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}
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}
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Log.d(TAG,"checkUntilLoadDexSuccess: 轮循结束，等待时间 " +(waitTime *i));
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}catch (Exceptione){
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e.printStackTrace();
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}
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}
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}
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packagecom.lanshifu.launchtest;
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importandroid.content.Intent;
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importandroid.os.Bundle;
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importandroid.view.View;
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importandroid.widget.Button;
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importandroidx.appcompat.app.AppCompatActivity;
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publicclassSplashActivityextendsAppCompatActivity {
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@Override
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protectedvoidonCreate(BundlesavedInstanceState) {
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setTheme(R.style.AppTheme);
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super.onCreate(savedInstanceState);
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setTitle("闪屏页");
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setContentView(R.layout.activity_splash);
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Buttonbutton =findViewById(R.id.button);
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View.OnClickListeneronClickListener =newView.OnClickListener() {
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@Override
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publicvoidonClick(Viewv) {
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startActivity(newIntent(SplashActivity.this,MainActivity.class));
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}
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};
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button.setOnClickListener(onClickListener);
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}
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}

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