ffmpeg 使用方法合集 作者: Shine 时间: 2020-01-11 分类: 软件 评论 > 等我想起来就会更新... # 从视频中提取音频 ``` ffmpeg -i nowtime.mp4 -vn -y -acodec copy nowtime.aac ffmpeg -i nowtime.mp4 -vn -y -acodec copy nowtime.m4a ```
Android 加了电话权限，运行还是闪退报错 作者: Shine 时间: 2019-12-07 分类: Android 评论 `AndroidManifest.xml` 文件 ``` <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" package="cc.nowtime.seven"> <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" tools:ignore="GoogleAppIndexingWarning"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> <!--拨打电话权限--> <uses-permission android:name="android.permission.CALL_PHONE" /> <!--拨打电话权限--> <uses-permission android:name="android.permission.SEND_SMS"/> </manifest> ``` # 运行报错 ``` D/AndroidRuntime: Shutting down VM E/AndroidRuntime: FATAL EXCEPTION: main Process: cc.nowtime.seven, PID: 12685 java.lang.SecurityException: Permission Denial: starting Intent { act=android.intent.action.CALL dat=tel:xxxxx cmp=com.android.server.telecom/.components.UserCallActivity } from ProcessRecord{e2ed078 12685:cc.nowtime.seven/u0a135} (pid=12685, uid=10135) with revoked permission android.permission.CALL_PHONE at android.os.Parcel.createException(Parcel.java:2071) at android.os.Parcel.readException(Parcel.java:2039) at android.os.Parcel.readException(Parcel.java:1987) at android.app.IActivityTaskManager$Stub$Proxy.startActivity(IActivityTaskManager.java:3851) at android.app.Instrumentation.execStartActivity(Instrumentation.java:1705) at android.app.Activity.startActivityForResult(Activity.java:5192) at android.app.Activity.startActivityForResult(Activity.java:5150) at android.app.Activity.startActivity(Activity.java:5521) at android.app.Activity.startActivity(Activity.java:5489) at cc.nowtime.seven.MainActivity$1.onClick(MainActivity.java:36) at android.view.View.performClick(View.java:7125) at android.view.View.performClickInternal(View.java:7102) at android.view.View.access$3500(View.java:801) at android.view.View$PerformClick.run(View.java:27336) at android.os.Handler.handleCallback(Handler.java:883) at android.os.Handler.dispatchMessage(Handler.java:100) at android.os.Looper.loop(Looper.java:214) at android.app.ActivityThread.main(ActivityThread.java:7356) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930) Caused by: android.os.RemoteException: Remote stack trace: at com.android.server.wm.ActivityStackSupervisor.checkStartAnyActivityPermission(ActivityStackSupervisor.java:1043) at com.android.server.wm.ActivityStarter.startActivity(ActivityStarter.java:760) at com.android.server.wm.ActivityStarter.startActivity(ActivityStarter.java:583) at com.android.server.wm.ActivityStarter.startActivityMayWait(ActivityStarter.java:1288) at com.android.server.wm.ActivityStarter.execute(ActivityStarter.java:514) Process 12685 terminated. ``` > ` java.lang.SecurityException: Permission Denial: starting Intent { act=android.intent.action.CALL dat=tel:xxxxx cmp=com.android.server.telecom/.components.UserCallActivity } from ProcessRecord{e2ed078 12685:cc.nowtime.seven/u0a135} (pid=12685, uid=10135) with revoked permission android.permission.CALL_PHONE` # 原因 你的 APP 添加**拨打电话权限**，但是未申请拨打电话权限，所以报错，解决办法： - **APP 主动申请获取** 拨打电话权限 - **手动授予** 拨打电话权限 # 主动授予拨打电话权限 1. 打开 **设置** > **应用和通知** 2. **找到你的应用** ![Snipaste_2019-12-07_20-13-40.png][1] 3. 然后允许对应权限就可以了 ![Snipaste_2019-12-07_20-14-38.png][2] # APP 主动申请获取 拨打电话权限 > 自己百度 ❀???? [1]: https://cdn.nowtime.cc/2019/12/07/512779244.png [2]: https://cdn.nowtime.cc/2019/12/07/1174856951.png
Java 创建子线程，使它立即开始执行 作者: Shine 时间: 2019-11-23 分类: Java 评论 ```java public class InvokeRun extends Thread { private int i; @Override public void run() { for(; i<100; i++){ System.out.println("["+Thread.currentThread().getName()+"]\t"+i); } } public static void main(String[] args) throws Exception{ for(int i=0; i<100; i++){ System.out.println(Thread.currentThread().getName()+"\t"+i); if(i == 20){ new InvokeRun().start(); new InvokeRun().start(); //让当前主线程休眠 1ms //它会去执行另一个就绪状态的线程 //这样的话，子线程就可以立即开始执行 Thread.sleep(1); } } } } ```
JavaScript 遍历 document.querySelectorAll() 作者: Shine 时间: 2019-11-20 分类: JavaScript 评论 # 如果使用 `forEach` 遍历，则会报错，因为它返回的不是一个数组，而是 `NodeList` ``` document.querySelectorAll('input[type='selece']]').forEach(function() { }); ``` 我们可以通过一下方法来遍历 ``` const selects = document.querySelectorAll("input[name='select']"); [].forEach.call(selects, function(select) { console.log(select); }); ```