安卓Intent打开系统进程汇总

1：拨打电话

        val uri = Uri.parse("tel:10086")
        val intent = Intent(Intent.ACTION_DIAL,uri)
        startActivity(intent)

2：发送短信

        val smsUri = Uri.parse("smsto:10086")
        val intent1 = Intent(Intent.ACTION_SENDTO,smsUri)
        intent1.putExtra("sms_body","Hello")
        startActivity(intent1)

3：打开浏览器

        val webViewUri = Uri.parse("https://www.baidu.com")
        val intent2 = Intent(Intent.ACTION_VIEW,webViewUri)
        startActivity(intent2)

4：打开多媒体，播放音乐

//        /storage/emulated/0/Music/foo.mp3
        val  file = Environment.getExternalStoragePublicDirectory("Music/foo.mp3")
        Log.d(Companion.TAG,file.path)
        Log.d(Companion.TAG,file.name)
        val intent = Intent(Intent.ACTION_VIEW)
        val audio = FileProvider.getUriForFile(this, "$packageName.fileProvider",file)
        Log.d(Companion.TAG,audio.path.toString())
        intent.setDataAndType(audio,"audio/mp3")
        startActivity(intent)

高版本安卓无法直接获取file,需要使用ContentProvide建立临时文件路径

Caused by: android.os.FileUriExposedException: file:///storage/emulated/0/Music/foo.mp3 exposed beyond app through Intent.getData()

使用ContentProvide 建立临时文件路径的方法：

1：在Manifest.xml里声明provider

        <provider
            android:name="androidx.core.content.FileProvider"
            android:authorities="${application}.fileProvider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/provider_paths"/>
        </provider>

2：res/xml 新建provider_paths.xml文件，内容如下

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path path="." name="external_storage_root" />
</paths>

注意name的值

Caused by: java.lang.IllegalArgumentException: Failed to find configured root that contains

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">

    <external-path path="." name="external_storage_root" /> <!-- 对应Environment.getExternalStorageDirectory() -->

    <cache-path name="cache_files" path="."/> <!-- 对应应用程序内部存储区域的cache子目录中的文件Context.getCacheDir() -->

    <external-files-path name="external_files" path="."/> <!-- 对应应用程序外部存储区根目录中的文件Context.getExternalFilesDir(null) -->

    <external-cache-path name="external_cache_files" path="."/> <!-- 对应应用程序外部缓存区域根目录中的文件Context.getExternalCacheDir() -->

    <files-path name="path_files" path="."/> <!-- 对应应用程序内部存储区域的子目录中的文件Context.getFilesDir() -->

    <external-media-path name="external_media_path" path="."/><!-- 对应代表应用程序外部媒体区域根目录中的文件Context.getExternalMediaDirs() -->

    <root-path path="." name="external_999_root" /> <!-- 对应SD卡 -->
    
</paths>

5：打开相机

        //打开相机
        val intent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
        //务必传值，不然onActivityResult照片返回值data为null
        intent.putExtra(MediaStore.EXTRA_OUTPUT,savePhoto())
        val launcherActivityInfo = registerForActivityResult(ActivityResultContracts.
        StartActivityForResult()
        ) {
            if (it != null) {
                if (intent.clipData!=null) {
                    for (i in 0 until intent.clipData!!.itemCount) {
                        val uri = intent.clipData!!.getItemAt(i).uri
                        Log.d(TAG, "multiple current Uri:$uri")
                    }
                }
            }

        }
        launcherActivityInfo.launch(intent)





    private fun savePhoto():Uri{
       val outPath = Environment.getExternalStorageDirectory()
           .absoluteFile.absolutePath+"/poo.jpg"
        val file = File(outPath)
        val audio = FileProvider.getUriForFile(this, "$packageName.fileProvider",file)
        Log.d(TAG,audio.path.toString())
        return audio
    }

6：获取相册并裁剪

//        获取相册并裁剪图片
        val intent = Intent(Intent.ACTION_GET_CONTENT)
        intent.type = "image/*"
        intent.putExtra("crop","true")
        intent.putExtra("aspectX",1)
        intent.putExtra("aspectY",2)
        intent.putExtra("outputX",20)
        intent.putExtra("outputY",40)
        intent.putExtra("output",savePhoto())
        intent.putExtra("outputFormat","JPEG")
        val launcher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {
            if (it != null) {
               if(it.data!=null){
                   Log.d(TAG,it.data!!.data.toString())
                   Glide.with(this).load(it.data!!.data).into(iamge)
               }
            }
        }
        launcher.launch(intent)

7：打开系统设置

        //进入系统设置页面
        val intent = Intent(android.provider.Settings.ACTION_SETTINGS)
        val launcher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()){

        }
        launcher.launch(intent)

8：打开系统无线网络设置页面

        //打开系统无线网络设置页面
        val intent = Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS)
        val launcher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()){

        }
        launcher.launch(intent)