Android应用内用其他应用打开文档

打开文档

  private void openFile(File file) {
        try {
            Log.e("文件名", file.getName());
            Intent intent = new Intent();
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            //设置intent的Action属性
            intent.setAction(Intent.ACTION_VIEW);
            //获取文件file的MIME类型
            String type = getMIMEType(file);
            //设置intent的data和Type属性。android 7.0以上crash,改用provider
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                Uri fileUri = FileProvider.getUriForFile(mContext, mContext.getPackageName() + ".provider", file);//android 7.0以上
                intent.setDataAndType(fileUri, type);
                grantUriPermission(mContext, fileUri, intent);
            } else {
                intent.setDataAndType(/*uri*/Uri.fromFile(file), type);
            }
            //跳转
            mContext.startActivity(intent);
        } catch (Exception e) {
            e.printStackTrace();
            toastLong("没有支持打开文档的应用");
        }
    }



 private static void grantUriPermission(Context context, Uri fileUri, Intent intent) {
        List resInfoList = context.getPackageManager().queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
        for (ResolveInfo resolveInfo : resInfoList) {
            String packageName = resolveInfo.activityInfo.packageName;
            context.grantUriPermission(packageName, fileUri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
        }
    }

    /**
     * 根据文件后缀名获得对应的MIME类型。
     *
     * @param file
     */
    private static String getMIMEType(File file) {

        String type = "*/*";
        String fName = file.getName();
        //获取后缀名前的分隔符"."在fName中的位置。
        int dotIndex = fName.lastIndexOf(".");
        if (dotIndex 

在Manifest.xml中配置

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

在资源文件中新建xml文件file_paths.xml

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

对于8.0安装：
//替换安装方法

void update() {
        if (Build.VERSION.SDK_INT >= 26) {
            boolean b = getPackageManager().canRequestPackageInstalls();
            if (b) {
                installApk();//安装应用的逻辑(写自己的就可以)
            } else {
                //请求安装未知应用来源的权限
                Intent intent = new Intent(Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES);
                startActivityForResult(intent, 10086);
            }
        } else {
            installApk();
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK && requestCode == 10086) {
            installApk();//再次执行安装流程，包含权限判等
        }
    }


    private void installApk() {
        File apkFile = new File(RyhuiApp.path);
        Intent intent = new Intent(Intent.ACTION_VIEW);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            //provider authorities
            Uri apkUri = FileProvider.getUriForFile(context.getApplicationContext(), "com.finance.ryhui.pepe.fileProvider", apkFile);
            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
            intent.setDataAndType(apkUri, "application/vnd.android.package-archive");

        } else {
            intent.setDataAndType(Uri.fromFile(apkFile), "application/vnd.android.package-archive");
        }
        context.startActivity(intent);
    }