android 版本升级的代码
时间: 2024-01-07 21:06:10 浏览: 122
Android 版本升级的代码主要涉及以下几个方面:
1. 检查当前版本号和最新版本号是否一致;
2. 判断是否需要进行版本升级;
3. 弹出对话框提示用户是否进行版本升级;
4. 开始下载最新版本的 APK 文件;
5. 安装最新版本的 APK 文件。
下面是一个基本的 Android 版本升级的代码示例:
```java
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
private static final int REQUEST_WRITE_EXTERNAL_STORAGE = 1;
private static final String DOWNLOAD_URL = "http://example.com/app.apk";
private int currentVersionCode;
private int latestVersionCode;
private String latestVersionName;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
currentVersionCode = BuildConfig.VERSION_CODE;
// 获取最新版本号和版本名,可以通过网络接口或者本地文件获取
latestVersionCode = 2;
latestVersionName = "1.1.0";
// 判断是否需要进行版本升级
if (latestVersionCode > currentVersionCode) {
showUpgradeDialog();
}
}
private void showUpgradeDialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("版本升级");
builder.setMessage("发现新版本 " + latestVersionName + ",是否立即升级?");
builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
requestWriteExternalStoragePermission();
}
});
builder.setNegativeButton("取消", null);
builder.show();
}
private void requestWriteExternalStoragePermission() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
downloadApk();
} else {
requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_WRITE_EXTERNAL_STORAGE);
}
} else {
downloadApk();
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == REQUEST_WRITE_EXTERNAL_STORAGE) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
downloadApk();
}
}
}
private void downloadApk() {
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(DOWNLOAD_URL));
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "app.apk");
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
downloadManager.enqueue(request);
}
private void installApk() {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory() + "/Download/app.apk")), "application/vnd.android.package-archive");
startActivity(intent);
}
// 在下载完成后调用
private void onDownloadComplete(long downloadId) {
DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
DownloadManager.Query query = new DownloadManager.Query();
query.setFilterById(downloadId);
Cursor cursor = downloadManager.query(query);
if (cursor.moveToFirst()) {
int status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS));
if (status == DownloadManager.STATUS_SUCCESSFUL) {
installApk();
}
}
cursor.close();
}
// 在 Activity 的 onResume 方法中调用
private void checkDownloadStatus() {
DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
DownloadManager.Query query = new DownloadManager.Query();
query.setFilterByStatus(DownloadManager.STATUS_RUNNING | DownloadManager.STATUS_PENDING);
Cursor cursor = downloadManager.query(query);
if (cursor.moveToFirst()) {
long downloadId = cursor.getLong(cursor.getColumnIndex(DownloadManager.COLUMN_ID));
onDownloadComplete(downloadId);
}
cursor.close();
}
}
```
在实际开发中,需要根据具体的需求进行相应的修改和优化。需要注意的是,Android 6.0 及以上版本需要动态申请存储权限。另外,需要根据实际情况修改下载文件的 URL 和文件名。
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