android 下载安装apk详情记载

1.权限相关

1.1 manifest相关

<!--    打开系统安装界面需要此权限-->
<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES"/>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

<application
    android:usesCleartextTraffic="true"> 支持明文请求网络，例如http请求

android 7.0以上版本禁止分享本地文件到第三方应用  差不都就是这个意思，反正就是不添加这个provider就不能唤起系统安装进程
<!--  非androidx 使用这个android.support.v4.content.FileProvider-->
        <provider
            android:name="androidx.core.content.FileProvider"
            android:authorities="com.zznode.zznodesdp.fileprovider" //此处包名+.fileprovider
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths" />
        </provider>

在res目录下创建xml文件夹 ，创建file_paths.xml文件

此处是暴露内存所有地址，path具体位置可以设置添加

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

2.activity代码

public class SdpActivity extends AppCompatActivity implements EasyPermissions.PermissionCallbacks{
    private File apkFile;
    private ProgressDialog dialog;
    final String apkUrl = "http://180.168.70.186:8808/apk/app-release.apk";
    String phoneNo;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sdp);
        Intent intent = getIntent();
        Uri data = intent.getData();
        phoneNo = data.getQueryParameter("phoneNo");
        String[] perms = {Manifest.permission.WRITE_EXTERNAL_STORAGE,
                Manifest.permission.READ_EXTERNAL_STORAGE,};
        if (EasyPermissions.hasPermissions(this, perms)) {
            checkInstallApp();
        } else {
            //没有权限进行提示且申请权限
            EasyPermissions.requestPermissions(this,"应用需要权限，请允许", 0, perms);
        }

    }
    private void checkInstallApp(){
        //拥有权限进行操作
        if (checkAppInstalled(this,"com.zznode.esiflutter")){
            System.out.println("已经安装sdp");
            intentSdp();
        }else {
            //未安装sdp 下载apk
            showNormalDialog();
        }
    }

    //跳转到sdp
    private void intentSdp(){
        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("zznodesdp://login?phoneNo="+phoneNo));
        startActivity(intent);
        finish();
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);

        EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);
    }

    private boolean checkAppInstalled(Context context, String pkgName) {
        if (pkgName== null || pkgName.isEmpty()) {
            return false;
        }
        final PackageManager packageManager = context.getPackageManager();
        List<PackageInfo> info = packageManager.getInstalledPackages(0);
        if(info == null || info.isEmpty())
            return false;
        for ( int i = 0; i < info.size(); i++ ) {
            if(pkgName.equals(info.get(i).packageName)) {
                return true;
            }
        }
        return false;
    }
    private void showNormalDialog(){
        final AlertDialog.Builder normalDialog =
                new AlertDialog.Builder(this);
//        normalDialog.setIcon(R.drawable.icon_dialog);
        normalDialog.setTitle("未安装能力提升APP是否安装？");
        normalDialog.setPositiveButton("安装",
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        //...To-do
                        downloadAPK(apkUrl);
                        System.out.println("开始更新");
                    }
                });
        normalDialog.setNegativeButton("取消",
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                       intentSdp();
                    }
                });
        // 显示
        normalDialog.show();
    }

    public void downloadAPK(final String apkUrl){
        //启动异步任务处理
        new AsyncTask<Void, Integer, Void>() {
            //1主线程显示提示试图

            @Override
            protected void onPreExecute() {
                dialog = new ProgressDialog(SdpActivity.this);
                dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                dialog.show();
                apkFile = new File(getExternalFilesDir(null), "update.apk");
            }

            //2分线程，联网请求
            @Override
            protected Void doInBackground(Void... params) {
                try{
                    //1 得到链接对象
                    URL url = new URL(apkUrl);
                    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                    connection.setConnectTimeout(5000);
                    connection.setReadTimeout(15000);
                    connection.connect();
                    int responseCode = connection.getResponseCode();
                    if(responseCode == 200){
                        //设置dialog最大进度
                        dialog.setMax(connection.getContentLength());
                        InputStream is = connection.getInputStream();
                        FileOutputStream fos = new FileOutputStream(apkFile);
                        byte[] buffer = new byte[1024];
                        int len = 0;
                        while ((len = is.read(buffer)) != -1){
                            fos.write(buffer, 0, len);
                            //在分线程发布进度
                            publishProgress(len);
//                            dialog.incrementProgressBy(len);
                        }
                        fos.close();
                        is.close();

                    }
                    connection.disconnect();
                    installAPK();
                }catch (Exception e){
                    try {//携带下载链接跳转到浏览器
                        if (!TextUtils.isEmpty(apkUrl) && apkUrl.contains("http")) {
                            Intent intent = new Intent();
                            intent.setAction("android.intent.action.VIEW");
                            Uri content_url = Uri.parse(apkUrl);
                            intent.setData(content_url);
                            startActivity(intent);
                        }

                    } catch (Exception eer) {
                        //异常处理
                        eer.printStackTrace();
                    }
                    e.printStackTrace();
                }
                return null;
            }

            //3主线程，更新界面

            @Override
            protected void onPostExecute(Void aVoid) {
                dialog.dismiss();
            }

            //在主线程中更新进度 （在publishProgress之后执行）
            @Override
            protected void onProgressUpdate(Integer... values) {
                dialog.incrementProgressBy(values[0]);
            }
        }.execute();
    }

    /**
     * 启动安装apk
     */
    private void installAPK() {
        Intent intent = new Intent(Intent.ACTION_VIEW);
        //判断是否是AndroidN以及更高的版本
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            //authority值需和manifest中匹配，包名+.fileprovider
            Uri contentUri = FileProvider.getUriForFile(this, "com.zznode.zznodesdp.fileprovider", apkFile);
            intent.setDataAndType(contentUri, "application/vnd.android.package-archive");
        } else {
            intent.setDataAndType(Uri.fromFile(apkFile), "application/vnd.android.package-archive");
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        }
        startActivity(intent);
        finish();
    }

    @Override
    public void onPermissionsGranted(int requestCode, @NonNull List<String> perms) {
        checkInstallApp();
    }

    @Override
    public void onPermissionsDenied(int requestCode, @NonNull List<String> perms) {
        finish();
    }
}

3.build.gradle中添加依赖

//需要宿主引用
implementation 'pub.devrel:easypermissions:1.2.0'

本文地址：https://blog.csdn.net/kailengchen/article/details/108724756