commit

DynamicIcon/.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild

DynamicIcon/DynamicIcon.md

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+动态更改图标主要用到**activity-alias**和**PackageManager的setComponentEnabledSetting方法**。具体步骤如下：
+
+###1、在AndroidManifest.xml中增加以下声明:
+
+    <activity-alias
+            android:name=".alias"
+            android:enabled="false"
+            android:icon="@mipmap/icon"
+            android:label="Alias"
+            android:targetActivity=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+    </activity-alias>
+
+完整文件如下:
+
+    <?xml version="1.0" encoding="utf-8"?>
+	<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+	    package="com.wangyz.dynamicicon">
+
+	    <application
+	        android:allowBackup="true"
+	        android:icon="@mipmap/ic_launcher"
+	        android:label="@string/app_name"
+	        android:roundIcon="@mipmap/ic_launcher_round"
+	        android:supportsRtl="true"
+	        android:theme="@style/AppTheme">
+	        <activity android:name=".MainActivity">
+	            <intent-filter>
+	                <action android:name="android.intent.action.MAIN" />
+
+	                <category android:name="android.intent.category.LAUNCHER" />
+	            </intent-filter>
+	        </activity>
+	        <activity-alias
+	            android:name=".alias"
+	            android:enabled="false"
+	            android:icon="@mipmap/icon"
+	            android:label="Alias"
+	            android:targetActivity=".MainActivity">
+	            <intent-filter>
+	                <action android:name="android.intent.action.MAIN" />
+
+	                <category android:name="android.intent.category.LAUNCHER" />
+	            </intent-filter>
+	        </activity-alias>
+	    </application>
+
+	</manifest>
+
+###2、切换图标
+
+    getPackageManager().setComponentEnabledSetting(getComponentName(),
+                PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
+                PackageManager.DONT_KILL_APP);
+    getPackageManager().setComponentEnabledSetting(new ComponentName(this,
+                        getPackageName() + ".alias"),
+                PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
+                0);
+
+setComponentEnabledSetting方法的最后一个参数，PackageManager.DONT_KILL_APP表示不关闭App，0表示关闭App刷新图标。
+
+完整文件如下:
+
+    package com.wangyz.dynamicicon;
+
+	import android.content.ComponentName;
+	import android.content.pm.PackageManager;
+	import android.os.Bundle;
+	import android.support.v7.app.AppCompatActivity;
+	import android.view.View;
+
+	public class MainActivity extends AppCompatActivity {
+
+	    @Override
+	    protected void onCreate(Bundle savedInstanceState) {
+	        super.onCreate(savedInstanceState);
+	        setContentView(R.layout.activity_main);
+	    }
+
+	    public void changeIcon(View view) {
+	        getPackageManager().setComponentEnabledSetting(getComponentName(),
+	                PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
+	                PackageManager.DONT_KILL_APP);
+	        getPackageManager().setComponentEnabledSetting(new ComponentName(this,
+	                        getPackageName() + ".MainActivity"),
+	                PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
+	                0);
+	    }
+
+	    public void changeIconAlias(View view) {
+	        getPackageManager().setComponentEnabledSetting(getComponentName(),
+	                PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
+	                PackageManager.DONT_KILL_APP);
+	        getPackageManager().setComponentEnabledSetting(new ComponentName(this,
+	                        getPackageName() + ".alias"),
+	                PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
+	                0);
+	    }
+	}

DynamicIcon/app/.gitignore

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+/build

DynamicIcon/app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 28
+    defaultConfig {
+        applicationId "com.wangyz.dynamicicon"
+        minSdkVersion 21
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'com.android.support:appcompat-v7:28.+'
+    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'com.android.support.test:runner:1.0.1'
+    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
+}

DynamicIcon/app/proguard-rules.pro

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

DynamicIcon/app/src/androidTest/java/com/wangyz/dynamicicon/ExampleInstrumentedTest.java

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+package com.wangyz.dynamicicon;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("com.wangyz.dynamicicon", appContext.getPackageName());
+    }
+}

DynamicIcon/app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.wangyz.dynamicicon">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+        <activity-alias
+            android:name=".alias"
+            android:enabled="false"
+            android:icon="@mipmap/icon"
+            android:label="Alias"
+            android:targetActivity=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+    </application>
+
+</manifest>