Android-插件化三插桩实现广播的加载

本篇是在实现Activity的基础上做的，插件apk的加载这块没有变化，所以本篇之介绍关于Broadcast加载的内容

1.宿主app

public class ProxyBroadCast extends BroadcastReceiver {

    private String mClassName;
    private MSInterfaceBroadcast msInterfaceBroadcast;

    public ProxyBroadCast(String className,Context context) {
        this.mClassName = className;
        try {
            Class<?> aClass = PluginLoadManager.getInstance().getDexClassLoader().loadClass(mClassName);  //记载插件广播类文件
            Constructor<?> constructor = aClass.getConstructor(new Class[]{});  //得到构造函数
            Object o = constructor.newInstance();                               //实例化函数
            if (o instanceof MSInterfaceBroadcast){
                msInterfaceBroadcast= (MSInterfaceBroadcast) o;
                msInterfaceBroadcast.attach(context);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        msInterfaceBroadcast.onReceive(context,intent); //转发到插件广播接收者
    }
}

这部分是广播的插桩部分的实现，主要包含两部分功能：

• 1.加载插件广播类并实例化，注入上下文
• 2.接收到广播转发到插件广播中去

2.广播接口标准

public interface MSInterfaceBroadcast {

    public void attach(Context context);

    public void onReceive(Context context, Intent intent);


}

这部分是根据BroadcastReceiver来定义的，可以根据需求进行增减

3.广播插件部分的实现

public class PluginReceiver extends BroadcastReceiver implements MSInterfaceBroadcast {

    @Override
    public void attach(Context context) {
        Toast.makeText(context, "attach success", Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context, "插件收到广播", Toast.LENGTH_SHORT).show();
    }
}

插件部分定义好接收者，并弹出了Toast

public class MainActivity extends BaseActivity {

    static final String ACTION = "com.meishe.PLUGIN_ACTION";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        View viewById = findViewById(R.id.image);

        IntentFilter intentFilter=new IntentFilter();
        intentFilter.addAction(ACTION);
        registerReceiver(new PluginReceiver(),intentFilter);

        viewById.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(that,"发送广播",Toast.LENGTH_SHORT).show();
                startService(new Intent(that,PluginService.class));
              sendBroadcast(new Intent(ACTION));
            }
        });
    }
}

为了简化，直接在插件的主页面做了广播的注册，并通过点击事件发送广播

注意：sendBroadcast，registerReceiver 这两个方法不能调用系统方法，需要重写

class BaseActivity extends AppCompatActivity implements MSInterfaceActivity {

    protected  Activity that;

    @Override
    public void attach(Activity proxyActivity) {
        that =proxyActivity;
    }
    
    ...
        
    @Override
    public void sendBroadcast(Intent intent) {
        that.sendBroadcast(intent);
    }


    @Override
    public Intent registerReceiver(BroadcastReceiver receiver, IntentFilter filter) {
        return that.registerReceiver(receiver, filter);
    }
...
   
}

这是发送广播和注册广播重写的部分代码逻辑，只是做了一个转发

测试能够完美运行……