android intent安装apk

/**
     * 安装apk
     *
     * @param context
     * @param apkPath
     */
    public static void installApk(Context context, String apkPath) {
        try {
            /**
             * provider
             * 处理android 7.0 及以上系统安装异常问题
             */
            File file = new File(apkPath);
            Intent install = new Intent();
            install.setAction(Intent.ACTION_VIEW);
            install.addCategory(Intent.CATEGORY_DEFAULT);
            install.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                Uri apkUri = FileProvider.getUriForFile(context, "com.chao.app.fileprovider", file);//在AndroidManifest中的android:authorities值 
                Log.d("======", "apkUri=" + apkUri); install.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);//添加这一句表示对目标应用临时授权该Uri所代表的文件 
                install.setDataAndType(apkUri, "application/vnd.android.package-archive"); 
            } else { 
                install.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive"); 
            } 
            context.startActivity(install); 
    } catch (Exception e) { 
        Log.d("======", e.getMessage());
       Toast.makeText(context, "文件解析失败", Toast.LENGTH_SHORT).show(); 
        deleteFile(apkPath);
     }
 }

androidManifest.xml 里面注册provider

<provider
        android:name="android.support.v4.content.FileProvider"
        android:authorities="com.chao.app.fileprovider"
        android:grantUriPermissions="true"
        android:exported="false">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/file_paths" />
 </provider>

需要添加权限

<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />

在/res/xml/下新建 file_paths.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <paths>
        <external-path path="" name="download" />
    </paths>
</resources>