如何从主目录访问产品风味的 class?
How to access the class of product flavor from main directory?
我的应用程序中有两种产品风味
flavorOne(src/flavorOne/java) 和 flavorTwo(src/flavorTwo/java)。 Main (src/main/java) 是两种风格都使用 类 的目录形式。我想从 Activity 中的 Activity 开始 activity src/flavorTwo/java/ActivityB.java ]src/main/java/ActivityA。虽然 运行 flavorTwo 有效但是当我切换 flavorOne 时它显示导入 com.packagename.ActivityB 错误。
+ App // module
|- src
|- main// shared srcDir
|- java
|- SharedActivity
+ flavorOne
|- java
|- FlavorOneActivity
+ flavorTwo
|- java
|- FlavorTwoActivity
这是目录 src/main/java/SharedActivity.javaSharedActivity.java
package com.example.buildvariants;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
/********************** works if it is in flavorOne otherwise it shows error on this package import ***********/
import com.example.buildvariants.flavorOne.LoginActivity;
public class SharedActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
//if flavor is flavorTwo hide the fab
//else flavor is flavorOne show fab and launch activity under flavorOne/java/LoginActivity.java
if (BuildConfig.FLAVOR.equalsIgnoreCase("flavorTwo")) {
fab.setVisibility(View.GONE);
} else {
fab.setVisibility(View.VISIBLE);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
startActivity(new Intent(SharedActivity.this, LoginActivity.class));
}
});
}
}
}
Activity flavorOne src/flavorOne/FlavorOneMainActivity.java
package com.example.buildvariants.flavorOne;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import com.example.buildvariants.R;
import com.example.buildvariants.SharedActivity;
public class FlavorOneMainActivity extends AppCompatActivity {
private static final String TAG =FlavorOneMainActivity.class.getSimpleName() ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.flavor_one_activity_main);
Intent intent = new Intent(FlavorOneMainActivity.this, SharedActivity.class);
startActivity(intent);
}
}
Activity flavorTwo src/flavorOne/FlavorTwoMainActivity.java
package com.example.buildvariants.flavorTwo;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import com.example.buildvariants.R;
import com.example.buildvariants.SharedActivity;
public class FlavorTwoMainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.flavor_two_activity_main);
startActivity(new Intent(FlavorTwoMainActivity.this, SharedActivity.class));
}
}
在 SharedActivity(src/main/java/) 的包导入中显示 error 如下所列当我更改了构建变体 flavorTwo。
package com.example.buildvariants;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
/********error on package import***********/
import com.example.buildvariants.flavorOne.LoginActivity;
public class SharedActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
//if flavor is flavorTwo hide the fab
//else flavor is flavorOne show fab and launch activity under flavorOne/java/LoginActivity.java
if (BuildConfig.FLAVOR.equalsIgnoreCase("flavorTwo")) {
fab.setVisibility(View.GONE);
} else {
fab.setVisibility(View.VISIBLE);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
startActivity(new Intent(SharedActivity.this, LoginActivity.class));
}
});
}
}
}
这个问题的最佳解决方案是什么?
它失败了,因为当你构建你的应用程序时,一次只存在一种产品风格的代码。因此,您真正想要做的是在两种产品口味中使用一个 Class 名称。
假设我们有一个 class 我们希望根据产品口味替换它,我们称之为 ReplacableActivity.java
要使替换正常工作,两种产品风格都需要有这个 class 并且主要的源代码集不会有 class
示例:
src/main/com/blah/myApp/ReplacableActivity #<- should not exist
# exists and is the implementation of ReplacableActivity for `flavorOne`
src/flavorOne/com/blah/myApp/ReplacableActivity.java
# exists and is the implementation of ReplaceableActivity.java for `flavorTwo`
src/flavorTwo/com/blah/myApp/ReplacableActivity.java
现在,对于您构建的所有产品风格,ReplacableActivity
都存在并且可以从 main
源集中引用。在构建时,只有该特定风格的 ReplaceableActivity
会与应用程序打包在一起。现在您的导入将按预期工作
import com.blah.myApp.ReplaceableActivity;
来自 main
源集。
编辑:
如果您唯一关心的是隐藏或显示单个元素,那么上面的内容就有点矫枉过正了。从 BuildConfigField
获取它会容易得多
android {
productFlavors {
flavorOne {
buildConfigField "boolean", "flavorShowsFab", 'false'
}
flavorTwo {
buildConfigField 'boolean', 'flavorShowsFab', 'true'
}
}
然后在您的 java 代码中执行
findViewById(R.id.myHidableFab).setVisibility(BuildConfig.flavorShowsFab ? View.VISIBLE : View.GONE));
您可以使用 继承概念 和 gradle[=47= 中的少量更改来维护相同的代码,而不是为每种风格创建不同的代码] 和 manifest 文件,我们可以分三步实现这个
1) 在应用级别 build.gradle
文件
中为每个风格合并源集
sourceSets {
flavorOne {
java.srcDirs = ['src/main/java','src/flavorOne/java']
}
flavorTwo {
java.srcDirs = ['src/main/java','src/flavorTwo/java']
}
}
2) 主要技巧发生在这里,为每个风味创建清单,并为它们定义启动器 activity 但不是在主要风味中
在主清单文件中:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myapplication">
<application
//no launcher defined here
</application>
</manifest>
风味一主要文件中:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.example.myapplication">
<application>
<activity
android:name="{Your launcher activity}">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
风味二清单文件中:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.example.myapplication">
<application>
<activity
android:name="{Your launcher activity}">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
这样我们在构建时合并清单文件时就不会出错 gradle
3) 所以在 main java src 中,创建 BaseSharedActivity.java
并编写您的正常实现,创建 SharedActivity.java
在每种风格中,并从每种风格中定义的启动器 activity 中调用它们 。
在每个口味的SharedActivity.java
中:
public class SharedActivity extends BaseSharedActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
//You can override whatever method you want from BaseSharedActivity here
}
这样你就不会为 SharedActivity 添加相同的代码,并且可以为不同风格的同一屏幕提供最大的自定义,你可以为启动器使用相同的逻辑 activity 还有
我的应用程序中有两种产品风味
flavorOne(src/flavorOne/java) 和 flavorTwo(src/flavorTwo/java)。 Main (src/main/java) 是两种风格都使用 类 的目录形式。我想从 Activity 中的 Activity 开始 activity src/flavorTwo/java/ActivityB.java ]src/main/java/ActivityA。虽然 运行 flavorTwo 有效但是当我切换 flavorOne 时它显示导入 com.packagename.ActivityB 错误。
+ App // module
|- src
|- main// shared srcDir
|- java
|- SharedActivity
+ flavorOne
|- java
|- FlavorOneActivity
+ flavorTwo
|- java
|- FlavorTwoActivity
这是目录 src/main/java/SharedActivity.javaSharedActivity.java
package com.example.buildvariants;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
/********************** works if it is in flavorOne otherwise it shows error on this package import ***********/
import com.example.buildvariants.flavorOne.LoginActivity;
public class SharedActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
//if flavor is flavorTwo hide the fab
//else flavor is flavorOne show fab and launch activity under flavorOne/java/LoginActivity.java
if (BuildConfig.FLAVOR.equalsIgnoreCase("flavorTwo")) {
fab.setVisibility(View.GONE);
} else {
fab.setVisibility(View.VISIBLE);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
startActivity(new Intent(SharedActivity.this, LoginActivity.class));
}
});
}
}
}
Activity flavorOne src/flavorOne/FlavorOneMainActivity.java
package com.example.buildvariants.flavorOne;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import com.example.buildvariants.R;
import com.example.buildvariants.SharedActivity;
public class FlavorOneMainActivity extends AppCompatActivity {
private static final String TAG =FlavorOneMainActivity.class.getSimpleName() ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.flavor_one_activity_main);
Intent intent = new Intent(FlavorOneMainActivity.this, SharedActivity.class);
startActivity(intent);
}
}
Activity flavorTwo src/flavorOne/FlavorTwoMainActivity.java
package com.example.buildvariants.flavorTwo;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import com.example.buildvariants.R;
import com.example.buildvariants.SharedActivity;
public class FlavorTwoMainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.flavor_two_activity_main);
startActivity(new Intent(FlavorTwoMainActivity.this, SharedActivity.class));
}
}
在 SharedActivity(src/main/java/) 的包导入中显示 error 如下所列当我更改了构建变体 flavorTwo。
package com.example.buildvariants;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
/********error on package import***********/
import com.example.buildvariants.flavorOne.LoginActivity;
public class SharedActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
//if flavor is flavorTwo hide the fab
//else flavor is flavorOne show fab and launch activity under flavorOne/java/LoginActivity.java
if (BuildConfig.FLAVOR.equalsIgnoreCase("flavorTwo")) {
fab.setVisibility(View.GONE);
} else {
fab.setVisibility(View.VISIBLE);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
startActivity(new Intent(SharedActivity.this, LoginActivity.class));
}
});
}
}
}
这个问题的最佳解决方案是什么?
它失败了,因为当你构建你的应用程序时,一次只存在一种产品风格的代码。因此,您真正想要做的是在两种产品口味中使用一个 Class 名称。
假设我们有一个 class 我们希望根据产品口味替换它,我们称之为 ReplacableActivity.java
要使替换正常工作,两种产品风格都需要有这个 class 并且主要的源代码集不会有 class
示例:
src/main/com/blah/myApp/ReplacableActivity #<- should not exist
# exists and is the implementation of ReplacableActivity for `flavorOne`
src/flavorOne/com/blah/myApp/ReplacableActivity.java
# exists and is the implementation of ReplaceableActivity.java for `flavorTwo`
src/flavorTwo/com/blah/myApp/ReplacableActivity.java
现在,对于您构建的所有产品风格,ReplacableActivity
都存在并且可以从 main
源集中引用。在构建时,只有该特定风格的 ReplaceableActivity
会与应用程序打包在一起。现在您的导入将按预期工作
import com.blah.myApp.ReplaceableActivity;
来自 main
源集。
编辑:
如果您唯一关心的是隐藏或显示单个元素,那么上面的内容就有点矫枉过正了。从 BuildConfigField
android {
productFlavors {
flavorOne {
buildConfigField "boolean", "flavorShowsFab", 'false'
}
flavorTwo {
buildConfigField 'boolean', 'flavorShowsFab', 'true'
}
}
然后在您的 java 代码中执行
findViewById(R.id.myHidableFab).setVisibility(BuildConfig.flavorShowsFab ? View.VISIBLE : View.GONE));
您可以使用 继承概念 和 gradle[=47= 中的少量更改来维护相同的代码,而不是为每种风格创建不同的代码] 和 manifest 文件,我们可以分三步实现这个
1) 在应用级别 build.gradle
文件
sourceSets {
flavorOne {
java.srcDirs = ['src/main/java','src/flavorOne/java']
}
flavorTwo {
java.srcDirs = ['src/main/java','src/flavorTwo/java']
}
}
2) 主要技巧发生在这里,为每个风味创建清单,并为它们定义启动器 activity 但不是在主要风味中
在主清单文件中:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myapplication">
<application
//no launcher defined here
</application>
</manifest>
风味一主要文件中:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.example.myapplication">
<application>
<activity
android:name="{Your launcher activity}">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
风味二清单文件中:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.example.myapplication">
<application>
<activity
android:name="{Your launcher activity}">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
这样我们在构建时合并清单文件时就不会出错 gradle
3) 所以在 main java src 中,创建 BaseSharedActivity.java
并编写您的正常实现,创建 SharedActivity.java
在每种风格中,并从每种风格中定义的启动器 activity 中调用它们 。
在每个口味的SharedActivity.java
中:
public class SharedActivity extends BaseSharedActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
//You can override whatever method you want from BaseSharedActivity here
}
这样你就不会为 SharedActivity 添加相同的代码,并且可以为不同风格的同一屏幕提供最大的自定义,你可以为启动器使用相同的逻辑 activity 还有