1.配置：

1.1 AndroidManifest.xml中添加权限和FileProvider：

  1. ——————————————————————————————————————–
  2. <uses-permission android:name=“android.permission.INTERNET”/>
  3. <uses-permission android:name=“android.permission.READ_EXTERNAL_STORAGE”/>
  4. <uses-permission android:name=“android.permission.WRITE_EXTERNAL_STORAGE”/>
  5. <uses-permission android:name=“android.permission.REQUEST_INSTALL_PACKAGES” />
  6. ——————————————————————————————————————–
  8. <provider
  9. android:name=“androidx.core.content.FileProvider”
  10. android:authorities=“com.fengzhi.wuyemanagement.fileprovider”
  11. android:grantUriPermissions=“true”
  12. android:exported=“false”>
  13. <meta-data
  14. android:name=“android.support.FILE_PROVIDER_PATHS”
  15. android:resource=“@xml/file_paths” />
  16. </provider>

1.2 新建文件（路径：res\xml\file_paths.xml）:

  1. <paths>
  2. <external-path path=“.” name=“external_storage_root” />
  3. </paths>

1.3 (app的)build.gradle:

  1. implementation “com.lzy.net:okgo:3.0.4”//okgo 网络请求
  2. implementation ‘com.google.code.gson:gson:2.8.2’//gson
  3. implementation “org.permissionsdispatcher:permissionsdispatcher:4.3.1”//权限
  4. annotationProcessor “org.permissionsdispatcher:permissionsdispatcher-processor:4.3.1”//权限

2.这里以点击按钮进行更新为例：

2.1 核心代码：

  1. private int version;
  2. /* 更新进度条 */
  3. private ProgressBar mProgress;
  4. private AlertDialog mDownloadDialog;
  6. ——————————————————————————————————————–
  8. //点击按钮，检查权限，，，检查更新的方法
  9. @NeedsPermission({Manifest.permission.READ_EXTERNAL_STORAGE,
  10. Manifest.permission.WRITE_EXTERNAL_STORAGE,
  11. Manifest.permission.REQUEST_INSTALL_PACKAGES})
  12. protected void checkUpdate() {
  13. showLoadingDialog(“检测更新中…”);
  14. version = AppUpdateUtil.getAppVersionCode(this);//检查当前版本号
  15. // 调用方法，，，接口的具体实现，接收传过来的参数，再调自己的方法，
  16. requestAppUpdate(version, new DataRequestListener<UpdateAppBean>() {
  17. @Override
  18. public void success(UpdateAppBean data) {
  19. // 返回的json，getStatus为0时，去下载apk文件,这里是下载apk文件的方法
  20. updateApp(data.getData().getApk_url());
  21. }
  23. @Override
  24. public void fail(String msg) {
  25. // 返回的json，getStatus为1时，提示：”已是*新版本！”
  26. SToast(msg);
  27. dismissLoadingDialog();
  28. }
  29. });
  30. }
  32. //检查版本号，*次请求(post)，，，UpdateAppBean根据服务器返回生成
  33. private void requestAppUpdate(int version, final DataRequestListener<UpdateAppBean> listener) {
  34. OkGo.<String>post(Const.HOST_URL + Const.UPDATEAPP).params(“version”, version).execute(new StringCallback() {
  35. @Override
  36. public void onSuccess(Response<String> response) {
  37. Gson gson = new Gson();
  38. UpdateAppBean updateAppBean = gson.fromJson(response.body(), UpdateAppBean.class);
  39. if (updateAppBean.getStatus() == 0) {
  40. listener.success(updateAppBean);
  41. } else {
  42. listener.fail(updateAppBean.getMsg());
  43. }
  44. }
  46. @Override
  47. public void onError(Response<String> response) {
  48. listener.fail(“服务器连接失败”);
  49. dismissLoadingDialog();
  50. }
  51. });
  52. }
  54. //如果有新版本，提示有新的版本，然后下载apk文件
  55. private void updateApp(String apk_url) {
  56. dismissLoadingDialog();
  57. DialogUtils.getInstance().showDialog(this, “发现新的版本，是否下载更新？”,
  58. new DialogUtils.DialogListener() {
  59. @Override
  60. public void positiveButton() {
  61. downloadApp(apk_url);
  62. }
  63. });
  64. }
  66. //下载apk文件并跳转(第二次请求，get)
  67. private void downloadApp(String apk_url) {
  68. OkGo.<File>get(apk_url).tag(this).execute(new FileCallback() {
  69. @Override
  70. public void onSuccess(Response<File> response) {
  71. String filePath = response.body().getAbsolutePath();
  72. Intent intent = IntentUtil.getInstallAppIntent(mContext, filePath);
  73. // 测试过这里必须用startactivity，不能用stratactivityforresult
  74. mContext.startActivity(intent);
  75. dismissLoadingDialog();
  76. mDownloadDialog.dismiss();
  77. mDownloadDialog=null;
  78. }
  80. @Override
  81. public void downloadProgress(Progress progress) {
  82. // showDownloadDialog();
  83. // mProgress.setProgress((int) (progress.fraction * 100));
  84. if (mDownloadDialog == null) {
  85. // 构造软件下载对话框
  86. AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
  87. builder.setTitle(“正在更新”);
  88. // 给下载对话框增加进度条
  89. final LayoutInflater inflater = LayoutInflater.from(mContext);
  90. View v = inflater.inflate(R.layout.item_progress, null);
  91. mProgress = (ProgressBar) v.findViewById(R.id.update_progress);
  92. builder.setView(v);
  93. mDownloadDialog = builder.create();
  94. mDownloadDialog.setCancelable(false);
  95. mDownloadDialog.show();
  96. }
  97. mProgress.setProgress((int) (progress.fraction * 100));
  98. }
  99. });
  100. }

2.2 DataRequestListener：

  1. public interface DataRequestListener<T> {
  2. //请求成功
  3. void success(T data);
  4. //请求失败
  5. void fail(String msg);
  6. }

2.3 AppUpdateUtil：

  1. /**
  2. * 获取App版本码
  3. *
  4. * @param context 上下文
  5. * @return App版本码
  6. */
  7. public static int getAppVersionCode(Context context) {
  8. return getAppVersionCode(context, context.getPackageName());
  9. }

2.4 IntentUtil：

  1. public class IntentUtil {
  3. /**
  4. * 获取安装App(支持7.0)的意图
  5. *
  6. * @param context
  7. * @param filePath
  8. * @return
  9. */
  10. public static Intent getInstallAppIntent(Context context, String filePath) {
  11. //apk文件的本地路径
  12. File apkfile = new File(filePath);
  13. if (!apkfile.exists()) {
  14. return null;
  15. }
  16. Intent intent = new Intent(Intent.ACTION_VIEW);
  17. Uri contentUri = FileUtil.getUriForFile(context, apkfile);
  18. intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
  19. if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
  20. intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
  21. }
  22. intent.setDataAndType(contentUri, “application/vnd.android.package-archive”);
  23. return intent;
  24. }

2.5 FileUtil：

  1. /**
  2. * 将文件转换成uri(支持7.0)
  3. *
  4. * @param mContext
  5. * @param file
  6. * @return
  7. */
  8. public static Uri getUriForFile(Context mContext, File file) {
  9. Uri fileUri = null;
  10. if (Build.VERSION.SDK_INT >= 24) {
  11. fileUri = FileProvider.getUriForFile(mContext, mContext.getPackageName() + “.fileprovider”, file);
  12. } else {
  13. fileUri = Uri.fromFile(file);
  14. }
  15. return fileUri;
  16. }