bcoder

Android中接收应用安装、覆盖安装、删除的广播（Android8.0+）

分类：Android, Java 阅读 (7,030) 已关闭评论

12月 102019

一、Android8.0之前的版本

在Android8.0之前，可以通过注册静态广播来监听应用安装或者删除的广播

如下是在AndroidManifest.xml中注册静态广播的一段代码

        <receiver android:name=".MyReceiver">
            <intent-filter>
                <action android:name="android.intent.action.PACKAGE_ADDED" />
                <action android:name="android.intent.action.PACKAGE_REMOVED" />
                <action android:name="android.intent.action.PACKAGE_REPLACED" />

                <data android:scheme="package" />
            </intent-filter>
        </receiver>

<intent-filter>

</intent-filter>

</receiver>

唯一需要注意的是，有一个android:scheme属性是必须的，否则收不到广播

二、Android8.0之后的版本

Android8.0之后很多静态广播不能用了，想要接收应用安装、覆盖安装和删除的广播，需要动态注册广播。

代码如下：

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_ADDED);
        filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
        filter.addAction(Intent.ACTION_PACKAGE_REPLACED);
        filter.addDataScheme("package");
        registerReceiver(mReceiver, filter);
    }

    @Override
    protected void onDestroy() {
        unregisterReceiver(mReceiver);
        super.onDestroy();
    }

    BroadcastReceiver mReceiver = new BroadcastReceiver(){

        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            Toast.makeText(MainActivity.this, action, Toast.LENGTH_SHORT).show();
        }
    };
}

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_ADDED);

filter.addAction(Intent.ACTION_PACKAGE_REMOVED);

filter.addAction(Intent.ACTION_PACKAGE_REPLACED);

filter.addDataScheme("package");

registerReceiver(mReceiver, filter);

}

@Override

protected void onDestroy() {

unregisterReceiver(mReceiver);

super.onDestroy();

}

BroadcastReceiver mReceiver = new BroadcastReceiver(){

@Override

public void onReceive(Context context, Intent intent) {

String action = intent.getAction();

Toast.makeText(MainActivity.this, action, Toast.LENGTH_SHORT).show();

}

};

}

需要注意的是，必须使用这句代码filter.addDataScheme(“package”);来指定DataScheme

FLAG_ACTIVITY_FORWARD_RESULT的使用

分类：Android, Java 阅读 (1,658) 已关闭评论

12月 102019

这几天看安卓系统源码的时候，遇到FLAG_ACTIVITY_FORWARD_RESULT，用于跨Activity传递ActivityResult

记得有一次面试还有面试官问到这个问题，当时还以为是说要用eventbus或者本地广播

我们先用一个图片看看这个标志的作用

下面看看三个Activity的代码

ActivityA的代码

public class AActivity extends AppCompatActivity {
    public static final int REQCODE_TEST = 10;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        String toastStr = "onActivityResult, " + this.getClass().getName()
                + ", RequestCode: " + requestCode;
        if(data != null && data.hasExtra("key")){
            toastStr += "，返回key值：" + data.getStringExtra("key");
        }
        Toast.makeText(this,  toastStr, Toast.LENGTH_SHORT).show();
    }

    public void onButton1Click(View view) {
        Intent intent = new Intent(this, BActivity.class);
        startActivityForResult(intent, REQCODE_TEST);
    }
}

public class AActivity extends AppCompatActivity {

public static final int REQCODE_TEST = 10;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

@Override

protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {

super.onActivityResult(requestCode, resultCode, data);

String toastStr = "onActivityResult, " + this.getClass().getName()

+ ", RequestCode: " + requestCode;

if(data != null && data.hasExtra("key")){

toastStr += "，返回key值：" + data.getStringExtra("key");

}

Toast.makeText(this, toastStr, Toast.LENGTH_SHORT).show();

}

public void onButton1Click(View view) {

Intent intent = new Intent(this, BActivity.class);

startActivityForResult(intent, REQCODE_TEST);

}

ActivityB的代码

public class BActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_b);

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        Toast.makeText(this, "onActivityResult, " + this.getClass().getName() + ", " + requestCode, Toast.LENGTH_SHORT).show();
    }

    public void onButton2Click(View view) {
        Intent intent = new Intent(this, CActivity.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);
        startActivity(intent);
//        startActivityForResult(intent, 0); //使用FLAG_ACTIVITY_FORWARD_RESULT标志就不能再使用startActivityForResult
    }
}

public class BActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_b);

}

@Override

protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {

super.onActivityResult(requestCode, resultCode, data);

Toast.makeText(this, "onActivityResult, " + this.getClass().getName() + ", " + requestCode, Toast.LENGTH_SHORT).show();

}

public void onButton2Click(View view) {

Intent intent = new Intent(this, CActivity.class);

intent.setFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);

startActivity(intent);

// startActivityForResult(intent, 0); //使用FLAG_ACTIVITY_FORWARD_RESULT标志就不能再使用startActivityForResult

}

ActivityC的代码

public class CActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_c);
    }

    @Override
    public void finish() {
        Intent resultIntent = new Intent();
        resultIntent.putExtra("key", "Value_C");
        setResult(AActivity.REQCODE_TEST, resultIntent);
        super.finish();
    }

}

public class CActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_c);

}

@Override

public void finish() {

Intent resultIntent = new Intent();

resultIntent.putExtra("key", "Value_C");

setResult(AActivity.REQCODE_TEST, resultIntent);

super.finish();

}

注意事项：

1.如果intent中设置了FLAG_ACTIVITY_FORWARD_RESULT就不能再使用startActivityForResult打开新的Activity了

2.setResult必须在super.finish()之前调用

3.这个标志是否适合于更多层Activity的转发？可以

Android8.1顶栏SystemUI下拉菜单中的快捷按钮修改

分类：Android, Java 阅读 (3,642) 已关闭评论

12月 092019

1、默认的快捷按钮的项目在res/values/config.xml中

项目的名称：quick_settings_tiles_default

默认的值为：wifi,bt,dnd,flashlight,rotation,battery,cell,airplane,cast

2、所有的快捷设置项

在res/value/config.xml中，项目名称：quick_settings_tiles_stock

项目值：wifi,cell,battery,dnd,flashlight,rotation,bt,airplane,location,hotspot,inversion,saver,work,cast,night

wifi – 无线网络
bt – 蓝牙
dnd – 勿扰模式
flashlight – 手电筒？
rotation – 自动旋转
battery – 省电模式？
cell – ?
airplane – 飞行模式
cast – 投射
location – 位置信息
hotspot – 无线热点
inversion – 反色
saver – 流量节省程序
work – ?
night – 夜晚模式？

3、有个编辑按钮，可以编辑常用的快捷按钮

当编辑后，按钮的配置存储在系统数据库的Secure.QS_TILES常量中，常量值：sysui_qs_tiles

使用下面命令可以查看修改后的值：

adb shell settings get secure sysui_qs_tiles

Android系统源代码跟踪调试小技巧

分类：Android, Java 阅读 (1,784) 已关闭评论

12月 062019

本来一直是在源码中加Log的方法进行调试

但是有些函数很长，if分支也很多，而且还有一些是通过线程或者binder、sendMessage等异步的方式调用的，加上系统编译又很慢，调试起来真是费劲

后来想到程序报错时会输出java的函数栈，我们能不能利用这个呢？可以一直追踪到函数的前几个调用函数。

答案是可以的，我们可以在代码中加入下面的代码，让程序打印调用栈

new Exception().printStackTrace()

加上这个以后，会打印堆栈，但不是抛出异常，这样就很方便的知道函数的调用栈列表了

对于调用Aidl时客户端的堆栈跟踪

假如我们跟踪某段代码后，发现这段代码是通过aidl被调用的，那我们就跟踪不到调用端的代码了，那么我们可以通过throw一个Exception的方式还跟踪。调用端会触发RemoteException而打印出堆栈。

当然，如果客户端try catch了RemoteException这个方式可能就不起作用了

throw new IllegalStateException(“Throw an aidl remote exception.” );

客户端会报如下样式的错误：

04-26 07:25:31.473  2072  2072 D AndroidRuntime: Shutting down VM
--------- beginning of crash
04-26 07:25:31.474  2072  2072 E AndroidRuntime: FATAL EXCEPTION: main
04-26 07:25:31.474  2072  2072 E AndroidRuntime: Process: com.android.settings:CryptKeeper, PID: 2072
04-26 07:25:31.474  2072  2072 E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.settings/com.android.settings.CryptKeeper}: java.lang.IllegalStateException: Throw an aidl remote exception.
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2778)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at android.app.ActivityThread.-wrap11(Unknown Source:0)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at android.os.Handler.dispatchMessage(Handler.java:106)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at android.os.Looper.loop(Looper.java:164)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at android.app.ActivityThread.main(ActivityThread.java:6494)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at java.lang.reflect.Method.invoke(Native Method)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:867)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: Caused by: java.lang.IllegalStateException: Throw an aidl remote exception.
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at android.os.Parcel.readException(Parcel.java:2021)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at android.os.Parcel.readException(Parcel.java:1959)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at android.content.pm.IPackageManager$Stub$Proxy.setComponentEnabledSetting(IPackageManager.java:4732)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at android.app.ApplicationPackageManager.setComponentEnabledSetting(ApplicationPackageManager.java:2276)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at com.android.settings.CryptKeeper.disableCryptKeeperComponent(CryptKeeper.java:1034)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at com.android.settings.CryptKeeper.onCreate(CryptKeeper.java:405)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at android.app.Activity.performCreate(Activity.java:7009)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at android.app.Activity.performCreate(Activity.java:7000)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2731)
04-26 07:25:31.474  2072  2072 E AndroidRuntime: 	... 9 more

04-26 07:25:31.473 2072 2072 D AndroidRuntime: Shutting down VM

--------- beginning of crash

04-26 07:25:31.474 2072 2072 E AndroidRuntime: FATAL EXCEPTION: main

04-26 07:25:31.474 2072 2072 E AndroidRuntime: Process: com.android.settings:CryptKeeper, PID: 2072

04-26 07:25:31.474 2072 2072 E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.settings/com.android.settings.CryptKeeper}: java.lang.IllegalStateException: Throw an aidl remote exception.

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2778)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at android.app.ActivityThread.-wrap11(Unknown Source:0)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:106)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at android.os.Looper.loop(Looper.java:164)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:6494)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:867)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: Caused by: java.lang.IllegalStateException: Throw an aidl remote exception.

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at android.os.Parcel.readException(Parcel.java:2021)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at android.os.Parcel.readException(Parcel.java:1959)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at android.content.pm.IPackageManager$Stub$Proxy.setComponentEnabledSetting(IPackageManager.java:4732)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at android.app.ApplicationPackageManager.setComponentEnabledSetting(ApplicationPackageManager.java:2276)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at com.android.settings.CryptKeeper.disableCryptKeeperComponent(CryptKeeper.java:1034)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at com.android.settings.CryptKeeper.onCreate(CryptKeeper.java:405)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at android.app.Activity.performCreate(Activity.java:7009)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at android.app.Activity.performCreate(Activity.java:7000)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2731)

04-26 07:25:31.474 2072 2072 E AndroidRuntime: ... 9 more

修改Android8.1吉字节、千字节、光字节、太字节的问题

分类：Android, Java 阅读 (2,137) 已关闭评论

12月 032019

Android8.1显示GB时默认显示吉字节

修改方法如下：

在源码目录下/external/icu/icu4c/source/data/unit中找到zh.txt文件

打开此文件，然后将其中的吉字节修改为GB，千字节修改为KB，兆字节修改为MB，太字节修改为TB，每一项可能有多个地方需要修改，然后保存

因为这个目录下的要单独编译，make clean都不管用，执行下面的命令：

$ cd external/icu/icu4c/source
$ ./runConfigureICU Linux
$ make INCLUDE_UNI_CORE_DATA=1

$ cd external/icu/icu4c/source

$ ./runConfigureICU Linux

$ make INCLUDE_UNI_CORE_DATA=1

将source/data/out/tmp/目录下的icudt58l.dat文件push到手机/system/usr/icu/目录下，重启手机即可查看效果

然后将source/data/out/tmp/目录下的icudt58l.dat文件拷贝到source/stubdata中，下次编译系统的时候就直接显示GB了。

转载自：https://www.jianshu.com/p/fadf33914875

imx8+Android8.1修改系统默认语言的方法

分类：Android, Java 阅读 (1,287) 已关闭评论

12月 032019

一、修改方法

在文件device/fsl/mek_8q/BoardConfig.mk中增加一行

PRODUCT_LOCALES = zh_CN

设置变量PRODUCT_LOCALES的值为zh_CN

注意：

１、别写在某个if判断中

２、不需要make clean，直接make就可生效

３、验证方法：可以查看out/target/product/mek_8q/system/build.prop中ro.product.locale的值验证，这里正确了再烧录验证

Android插件化初探之apk加载和反射调用函数

分类：Android, Java 阅读 (1,622) 已关闭评论

12月 022019

一、整体试验步骤

1.建立子apk，新建一个android应用项目，叫firstplugin

2.在java根目录下新建一个类，叫LoginImpl

3.在LoginImpl.java中实现一个静态方法, login()，此方法只输出一个Log

package com.zht.car.firstplugin;

import android.util.Log;
import android.widget.Toast;

public class LoginImpl {
    public static void login(){
        Log.i("LoginImpl", "login");
    }
}

package com.zht.car.firstplugin;

import android.util.Log;

import android.widget.Toast;

public class LoginImpl {

public static void login(){

Log.i("LoginImpl", "login");

}

4.编译生成apk，push到手机的/sdcard目录，此处生成的文件名为firstplugin-debug.apk

5.开始建宿主apk，新建另外一个Android应用项目PlugInHostApp

6.在MainActivity的onCreate中增加如下代码：

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        String dexOutputDir = getApplicationInfo().dataDir;

        String apkpath = "/sdcard/firstplugin-debug.apk";
        DexClassLoader loader = new DexClassLoader(apkpath, dexOutputDir,
                null,getClass().getClassLoader());
        try {
            Class&lt;?&gt; aClass = loader.loadClass("com.zht.car.firstplugin.LoginImpl");
            Object aClassInstance = aClass.newInstance();
            Method method = aClass.getMethod("login");
            method.invoke(null, null);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InstantiationException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
    }

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

String dexOutputDir = getApplicationInfo().dataDir;

String apkpath = "/sdcard/firstplugin-debug.apk";

DexClassLoader loader = new DexClassLoader(apkpath, dexOutputDir,

null,getClass().getClassLoader());

try {

Class<?> aClass = loader.loadClass("com.zht.car.firstplugin.LoginImpl");

Object aClassInstance = aClass.newInstance();

Method method = aClass.getMethod("login");

method.invoke(null, null);

} catch (ClassNotFoundException e) {

e.printStackTrace();

} catch (IllegalAccessException e) {

e.printStackTrace();

} catch (InstantiationException e) {

e.printStackTrace();

} catch (NoSuchMethodException e) {

e.printStackTrace();

} catch (InvocationTargetException e) {

e.printStackTrace();

}

7.编译运行，看log中是否输出了login这个字符串

二、遇到的问题和解决方法

1.java.lang.ClassNotFoundException: Didn’t find class “com.zht.car.firstplugin.LoginImpl” on path错误

解决方法：

查看是否有访问外部存储目录的权限（笔者遇到的就是这个问题，程序不会在new DexClassLoader时报无权限访问或者找不到文件的错误，而会在loadClass时报找不到类的错误）
关闭Android Studio的Instant run选项，在菜单Settings->Build, Execution, Deployment中（笔者是在Ubuntu中使用Android Studio，没找到此选项）

Android中获取应用的安装器名称

分类：Android, Java 阅读 (1,316) 已关闭评论

11月 292019

通过获取安装器的名称我们可以判断应用是来自哪个应用市场

当然现在普遍是通过配置gradle来区别应用的安装渠道，不过这个还可以用于判断用户是不是手动进行安装的

代码很简单，如下：

        PackageManager pm = getPackageManager();
        String installername = pm.getInstallerPackageName("com.eg.android.AlipayGphone");
        Log.d(LOG_TAG, "installerName: " + installername);

PackageManager pm = getPackageManager();

String installername = pm.getInstallerPackageName("com.eg.android.AlipayGphone");

Log.d(LOG_TAG, "installerName: " + installername);

结果示例：

如：com.huawei.appmarket – 是华为应用市场

com.android.packageinstaller – 是用户手动安装的

通过action获取其他应用中的Activity

分类：Android, Java 阅读 (1,489) 已关闭评论

11月 292019

测试环境：自己编译的Android8.1系统（userDebug模式）

首先目标应用的AndroidManifest.xml中定义Activity的时候，必须设置一个intent-filter以及action属性，如下：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.zht.car.aidlclient">

    <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=".Test2Activity">
            <intent-filter>
                <action android:name="action_abc" />
                <category android:name="abc" />
            </intent-filter>
        </activity>
        <activity android:name=".Test1Activity">
            <intent-filter>
                <action android:name="action_abc" />
                <category android:name="abc" />
            </intent-filter>
        </activity>
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.zht.car.aidlclient">

<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">

<intent-filter>

</intent-filter>

</activity>

<intent-filter>

</intent-filter>

</activity>

<intent-filter>

</intent-filter>

</activity>

</application>

</manifest>

上面的代码Test1Activity和Test2Activity都有一个intent-filter属性，以及他下面的action子属性

然后使用下面的代码就可以获取这个应用中的有action=”action_abc”的activity了。

        Intent intent = new Intent("action_abc");
        intent.setPackage("com.zht.xxx.xxxxxxxx"); //此处为目标应用的包名

        PackageManager pm = getPackageManager();
        List<ResolveInfo> alist = pm.queryIntentActivities(intent, PackageManager.MATCH_ALL);
        for(int i = 0; i < alist.size(); i++){
            Log.d(LOG_TAG, "queryIntentActivities: " + alist.get(i).activityInfo.name);
            Log.d(LOG_TAG, "LaunchMode: "  + alist.get(i).activityInfo.launchMode);
            Log.d(LOG_TAG, "processName: "  + alist.get(i).activityInfo.processName);
        }

Intent intent = new Intent("action_abc");

intent.setPackage("com.zht.xxx.xxxxxxxx"); //此处为目标应用的包名

PackageManager pm = getPackageManager();

List<ResolveInfo> alist = pm.queryIntentActivities(intent, PackageManager.MATCH_ALL);

for(int i = 0; i < alist.size(); i++){

Log.d(LOG_TAG, "queryIntentActivities: " + alist.get(i).activityInfo.name);

Log.d(LOG_TAG, "LaunchMode: " + alist.get(i).activityInfo.launchMode);

Log.d(LOG_TAG, "processName: " + alist.get(i).activityInfo.processName);

}

imx8+android8.1开启adb remount过程

分类：Android, Java, Uncategorized 阅读 (2,268) 已关闭评论

11月 262019

博文背景：imx 8qxp主板，android8.1系统，系统编译模式userDebug模式

一、开启成功的步骤

打开系统的开发者选项，并在开发者选项中将OEM unlocking设为开启状态
连接adb并执行adb root
执行adb disable-verity
执行adb reboot bootloader
连接otg线
系统重启后会停在bootloader处，在电脑上执行fastboot oem unlocking，(在Ubuntu中需要另外开一个窗口执行这个命令，否则一直提示< waiting for any device >)然后等待提示成功后重启车机

Fastboot: Got bootloader commands!
1 setufp mode 0
1 cdns3_uboot_initmode 0
flashing unlock.
It is able to unlock device. 1
Start /data wipe process....
Wipe /data completed.
Start stored_rollback_index wipe process....
Wipe stored_rollback_index completed.

Fastboot: Got bootloader commands!

1 setufp mode 0

1 cdns3_uboot_initmode 0

flashing unlock.

It is able to unlock device. 1

Start /data wipe process....

Wipe /data completed.

Start stored_rollback_index wipe process....

Wipe stored_rollback_index completed.

重启成功后，再执行adb root和adb remount即可

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