(1) Distinguish between application and library
if (isApplicationModule1.toBoolean()){
apply plugin: 'com.android.application'
}else{
apply plugin: 'com.android.library'
}
(2) Add applicationId
defaultConfig {
if (isApplicationModule1.toBoolean()){
applicationId "com.demo.myapplication.module1"
}
}
(3) Android manifest startup portal
sourceSets {
main {
if (isApplicationModule1.toBoolean()) {
manifest.srcFile 'src/main/module/AndroidManifest.xml'
} else {
manifest.srcFile 'src/main/AndroidManifest.xml'
}
}
}
4. Introduce other modules into the main app module
One thing to note is that if each component runs independently, it cannot be used as a dependency library for the app module, so the build.exe under the app module Dependency judgment is required in the gradle file
if (!isApplicationModule1.toBoolean()){
implementation project(':module1')
}
if (!isApplicationModule2.toBoolean()){
implementation project(':module2')
}
if (!isApplicationModule3.toBoolean()){
implementation project(':module3')
}
implementation project(':common')
Introduce common module into Module
implementation project(':common')
At this point, each Module can run independently by modifying the configuration.
5. Introduction of Arouter
Due to the decoupling between modules, the usual Intent jump requires guided packets. After Arouter is introduced, it can jump without guided packets.
Integrating Arouter
(1) Introduce dependency
Add in common
api("com.alibaba:arouter-api:$rootProject.ext.arouterLibVersion") { exclude group: 'com.android.support' }
annotationProcessor "com.alibaba:arouter-compiler:$rootProject.ext.arouterAnnotationLibVersion"
Annotations need to be added under each Module
annotationProcessor "com.alibaba:arouter-compiler:$rootProject.ext.arouterAnnotationLibVersion"
(2) Build. Of each Module introduced into Arouter Add the following code to gradle
defaultConfig {
...
//arouter
javaCompileOptions {
annotationProcessorOptions {
arguments = [moduleName: project.getName()]
}
}
}
(3) Initialize in Application
if (isDebug) {
ARouter.openLog();
ARouter.openDebug();
}
ARouter.init(this);
(4) Jump using Arouter
Define route
@Route(path = "/app/main")
public class MainActivity extends AppCompatActivity {
...
}
Jump route
ARouter.getInstance().build("/app/main").navigation();
6. ButterKnife's pit
There is no problem using this Library for a single project, but an error is reported when using it as a component. In addition to a series of configurations, there is also an uncomfortable place that you need to change r in the Library to R2, but when you want to change the Library to Application, you have to change R2 to R, isn't it very uncomfortable.
!!! So I'm currently giving up using ButterKnife in the Library
7. Pit of switch (view. Getid())
Due to the view in the Library Getid may be a variable, so you need to change switch to if.
Shortcut:
Move the cursor over the line of switch, press alt + Enter, and click Replace switch to if
8. Duplication of resources
No static field XXX of type I in class Lcom/XXX/R$id error
The problem is that the layout and main layout names are repeated. Get into the habit of adding an identifier in front of the resource file in the Library, such as library_layout
Another way is just to help add constraints and reminders.
android {
compileSdkVersion rootProject.ext.compileSdkVersion
buildToolsVersion rootProject.ext.buildToolsVersion
// Add resource constraints and reminders
if (toolsIsLibrary.toBoolean()) {
resourcePrefix "${project.name}_"
}
}
To ensure that it does not conflict with other module s, it is recommended to prefix resource files such as string, style, color and dimens ions.
6, Stepping pit
1. ARouter componentized packaging failed
Problem: program type already present: com alibaba. android. arouter. routes. ARouterGroupGroupservice
The same Group cannot be used in ModuleA and ModuleB.
According to the prompt, the error service is a duplicate Group. After global search, it is found that the following codes exist in both ModuleA and ModuleB.
package com.bp.tech.common.util;
import android.content.Context;
import com.alibaba.android.arouter.facade.annotation.Route;
import com.alibaba.android.arouter.facade.service.SerializationService;
import java.lang.reflect.Type;
@Route(path = "/service/json")
public class JsonServiceImpl implements SerializationService {
@Override
public void init(Context context) {
}
@Override
public <T> T json2Object(String text, Class<T> clazz) {
return GsonUtils.parseObject(text, clazz);
}
@Override
public String object2Json(Object instance) {
return GsonUtils.toJsonString(instance);
}
@Override
public <T> T parseObject(String input, Type clazz) {
return GsonUtils.parseObject(input, clazz);
}
# ending
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> These questions were asked during the interview with Tencent, Baidu, Xiaomi, LETV, meituan, 58, cheetah, 360, Sina, Sohu and other front-line Internet companies this year. And most of them have sorted out the answers. Being familiar with these knowledge points will greatly increase the probability of passing the first two rounds of technical interviews
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> have Android Development 3-5 I hope to break through the bottleneck and become a small partner of architects. You can pay attention to me
**[CodeChina Open source projects:< Android study PDF+Architecture video+Interview documents+Source code Notes](https://codechina.csdn.net/m0_60958482/android_p7)**
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