android App内下载apk 并升级

1.检测版本，弹框，确认是否需要升级；

2.下载apk流程；

主要代码

下载apk代码；安装APP权限申请；3.文件存储；

import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;import android.net.Uri;import android.os.Build;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.os.Message;import android.provider.Settings;import android.view.View;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;import androidx.appcompat.app.AppCompatActivity;import androidx.core.content.FileProvider;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;public class UpdateActivity extends AppCompatActivity {    private static final String TAG = UpdateActivity.class.getSimpleName();    private static final int PROGRESS = 100;//进度    private static final int DOWNLOAD_COMPLETE = 200;//下载完成    private static final int INSTALL_PERMISS_CODE = 500;//安装权限    private static final int INSTALL_COMPLETE = 600;    private Button btnDownInstall;//下载安装    private static String appDownloadUrl = "your apk url";//下载文件的地址    private static int down = 0;//状态码    File file;    private Handler handler = new Handler() {        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            switch (msg.what) {                case DOWNLOAD_COMPLETE:                    Toast.makeText(mContext, "下载完成,准备安装！", Toast.LENGTH_SHORT).show();                    installApk();                    break;                case PROGRESS:                    String result = (String) msg.obj;                    mTvProgress.setText(result);                    break;            }        }    };    private TextView mTvProgress;    private Context mContext;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_update);        initParamsAndValues();        initView();    }    private void initParamsAndValues() {        mContext = this;    }    private void initView() {        btnDownInstall = (Button) findViewById(R.id.btn_down_install);        btnDownInstall.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                downFile(appDownloadUrl);            }        });        mTvProgress = findViewById(R.id.tv_progress);    }    // 接收到安装完成apk的广播    BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {        @Override        public void onReceive(Context context, Intent intent) {            Toast.makeText(context, "安装完成！", Toast.LENGTH_SHORT).show();            Message message = handler.obtainMessage();            message.what = INSTALL_COMPLETE;            handler.sendMessage(message);        }    };        private File downFile(final String httpUrl) {        new Thread(new Runnable() {            @Override            public void run() {                try {                    URL url = new URL(httpUrl);                    HttpURLConnection connection = (HttpURLConnection) url.openConnection();                    connection.setRequestMethod("GET");                    connection.setConnectTimeout(5000);                    FileOutputStream fileOutputStream = null;                    InputStream inputStream;                    if (connection.getResponseCode() == 200) {                        inputStream = connection.getInputStream();                        if (inputStream != null) {final int appLength = connection.getContentLength();file = getFile(httpUrl);fileOutputStream = new FileOutputStream(file);byte[] buffer = new byte[1024];int length = 0;int total = 0;while ((length = inputStream.read(buffer)) != -1) {    //写入文件中    fileOutputStream.write(buffer, 0, length);    //统计进度    total += length;    String result = total * 1.0 / appLength * 100 + "%";    Message message = handler.obtainMessage();    message.what = PROGRESS;    message.obj = result;    handler.sendMessage(message);}fileOutputStream.close();fileOutputStream.flush();                        }                        inputStream.close();                    }                    //下载完成,开始安装                    Message message = handler.obtainMessage();                    message.what = DOWNLOAD_COMPLETE;                    handler.sendMessage(message);                } catch (MalformedURLException e) {                    e.printStackTrace();                } catch (IOException e) {                    e.printStackTrace();                }            }        }).start();        return file;    }        private void installApk() {        Intent intent = new Intent(Intent.ACTION_VIEW);        if (file != null && file.exists()){            // 兼容7.0            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {                intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);                Uri contentUri = FileProvider.getUriForFile(mContext, mContext.getPackageName() + ".fileProvider", file);                intent.setDataAndType(contentUri, "application/vnd.android.package-archive");                //兼容8.0                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {                    boolean hasInstallPermission = mContext.getPackageManager().canRequestPackageInstalls();                    if (!hasInstallPermission) {                        startInstallPermissionSettingActivity();                        return;                    }                }            } else {                // <7.0                intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);            }            // activity任务栈中Activity的个数>0            if (mContext.getPackageManager().queryIntentActivities(intent, 0).size() > 0) {                mContext.startActivity(intent);            }        }    }    private void startInstallPermissionSettingActivity() {        //注意这个是8.0新API        Uri packageURI = Uri.parse("package:"+getPackageName());        Intent intent = new Intent(Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES,packageURI);        startActivityForResult(intent, INSTALL_PERMISS_CODE);    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        // 授权完成        if (resultCode == RESULT_OK && requestCode == INSTALL_PERMISS_CODE) {            Toast.makeText(this,"安装应用",Toast.LENGTH_SHORT).show();            installApk();        } else {            Toast.makeText(this,"授权失败，无法安装应用",Toast.LENGTH_SHORT).show();        }    }    @Override    protected void onStart() {        super.onStart();        IntentFilter intentFilter = new IntentFilter();        intentFilter.addAction(Intent.ACTION_PACKAGE_ADDED);        intentFilter.addDataScheme("package");        // 注册一个广播        registerReceiver(broadcastReceiver, intentFilter);    }    @Override    protected void onDestroy() {        super.onDestroy();        // 解除广播        unregisterReceiver(broadcastReceiver);    }        private File getFile(String url) {        // 使用缓存目录,这个时候不需要申请存储权限        // 目录不存在，那么创建        File dir = new File(getExternalCacheDir(),"download");        if (!dir.exists()){            dir.mkdir();        }        // 创建文件        File file = new File(dir,getFilePath(url));        return file;    }        private String getFilePath(String url) {        return url.substring(url.lastIndexOf("/"), url.length());    }}

兼容Android 12 版本 存储权限处理：

新建xml文件；

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

manifest配置文件：

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

注，可运行下载链接 APP内升级代码源码

来源地址：https://blog.csdn.net/qingshui1234567/article/details/124449424