发广播打开关闭vox，设置级数。开启vox时屏蔽ptt键功能-创新互联

Vox功能就是写入这个节点打开后，声音来了就驱动层会自动按下ptt键，有点类似通话

首先要确定驱动的节点也写入，这里的节点是/dev/debussy_vox_misc

接下来广播处理

frameworks/base/services/core/java/com/android/server/BatteryService.java

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;



filter.addAction("unipro.vox.set");



else if(action.equals("unipro.vox.set")){

String isIntercept = SystemProperties.get("persist.sys.intercept.vox","0");

                                    if(isIntercept.equals("0")){ //如果要屏蔽Ptt

                        int data =intent.getIntExtra("open", 0);

                        if(data< 5 && data >0){

                                    SystemProperties.set("persist.sys.intercept.ptt", "1");

                        writeFile("/dev/debussy_vox_misc",""+data);

                                    }else {

                                    SystemProperties.set("persist.sys.intercept.ptt", "0");

                        writeFile("/dev/debussy_vox_misc",""+data);

                                    } 

}          

       }



private void writeFile(String path, String content) {

        FileWriter fileWriter = null;

        try {

            fileWriter = new FileWriter(path);

            if (fileWriter != null) {

                fileWriter.write(content);

            }

        } catch (Exception e) {

            e.printStackTrace();

        } finally {

            if (fileWriter != null)

                try {

                    fileWriter.close();

                } catch (IOException e) {

                    e.printStackTrace();

                }

        }

}

屏蔽ptt还需要在

base/services/core/java/com/android/server/policy/PhoneWindowManager.java

在发广播的时候加入

String isIntercept = SystemProperties.get("persist.sys.intercept.ptt", "0");

                android.util.Log.i("yantao","isIntercept="+isIntercept);

                if(isIntercept.equals("0")){

只有vox关了才能发广播

import android.os.SystemProperties;

写入节点需要权限

device/mediatek/mt6739/init.mt6739.rc

#vox

    chown system system /dev/debussy_vox_misc

    chmod 0777 /dev/debussy_vox_misc

这个还需要avc权限，详情主页搜avc相关篇章

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