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Code Issues Projects Releases Packages Wiki Activity Actions

add backup/restore

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woheller69 2023-04-17 10:53:33 +02:00
parent 67027dc8e6
commit 7a2edcf814
12 changed files with 297 additions and 2 deletions
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69
app/src/main/java/org/woheller69/weather/Backup.java Normal file
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@ -0,0 +1,69 @@
package org.woheller69.weather;
import android.Manifest;
import android.app.Activity;
import android.content.Context;
import android.content.pm.PackageManager;
import android.net.Uri;
import androidx.appcompat.app.AlertDialog;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
public class Backup {
public static final int PERMISSION_REQUEST_CODE = 123;
public static boolean checkPermissionStorage (Context context) {
int result = ContextCompat.checkSelfPermission(context, Manifest.permission.READ_EXTERNAL_STORAGE);
int result1 = ContextCompat.checkSelfPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE);
return result == PackageManager.PERMISSION_GRANTED && result1 == PackageManager.PERMISSION_GRANTED;
}
public static void requestPermission(Activity activity) {
AlertDialog.Builder builder = new AlertDialog.Builder(activity);
builder.setIcon(R.drawable.ic_warning_amber_black_24dp);
builder.setTitle(activity.getResources().getString(R.string.permission_required));
builder.setMessage(activity.getResources().getString(R.string.permission_message,activity.getResources().getString(R.string.app_name)));
builder.setPositiveButton(R.string.dialog_OK_button, (dialog, which) -> {
dialog.cancel();
ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, PERMISSION_REQUEST_CODE);
});
builder.setNegativeButton(R.string.dialog_NO_button, (dialog, whichButton) -> dialog.cancel());
AlertDialog dialog = builder.create();
dialog.show();
}
public static void zipExtract(Context context, File targetDir, Uri zipFile) {
ZipEntry zipEntry;
int readLen;
byte[] readBuffer = new byte[4096];
try {
InputStream src = context.getContentResolver().openInputStream(zipFile);
try {
try (ZipInputStream zipInputStream = new ZipInputStream(src)) {
while ((zipEntry = zipInputStream.getNextEntry()) != null) {
File extractedFile = new File(targetDir ,zipEntry.getName());
try (OutputStream outputStream = new FileOutputStream(extractedFile)) {
while ((readLen = zipInputStream.read(readBuffer)) != -1) {
outputStream.write(readBuffer, 0, readLen);
}
}
}
}
} catch (IOException ioException) {
ioException.printStackTrace();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
}

115
app/src/main/java/org/woheller69/weather/activities/BackupRestoreActivity.java Normal file
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@ -0,0 +1,115 @@
package org.woheller69.weather.activities;
import static android.os.Environment.DIRECTORY_DOCUMENTS;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.view.Gravity;
import android.view.View;
import android.widget.Toast;
import androidx.activity.result.ActivityResultLauncher;
import androidx.activity.result.contract.ActivityResultContracts;
import androidx.appcompat.app.ActionBar;
import androidx.appcompat.app.AlertDialog;
import net.lingala.zip4j.ZipFile;
import net.lingala.zip4j.exception.ZipException;
import org.woheller69.weather.Backup;
import org.woheller69.weather.R;
import java.io.File;
import java.util.Objects;
public class BackupRestoreActivity extends NavigationActivity{
ActivityResultLauncher<Intent> mRestore;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_backuprestore);
ActionBar actionBar = getSupportActionBar();
if (actionBar != null) {
actionBar.setDisplayHomeAsUpEnabled(true);
}
mRestore = registerForActivityResult(
new ActivityResultContracts.StartActivityForResult(),
result -> {
File intData = new File(Environment.getDataDirectory() + "//databases//" + this.getPackageName());
if (result.getData()!=null && result.getData().getData()!=null) Backup.zipExtract(this, intData, result.getData().getData());
});
}
@Override
protected int getNavigationDrawerID() {
return R.id.nav_backuprestore;
}
public void performBackup(View view) {
File extStorage;
File intData;
intData = new File(Environment.getDataDirectory()+"//data//" + this.getPackageName() + "//databases//");
extStorage = Environment.getExternalStoragePublicDirectory(DIRECTORY_DOCUMENTS);
String filesBackup = getResources().getString(R.string.app_name)+".zip";
final File dbBackup = new File(extStorage, filesBackup);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage(getResources().getString(R.string.backup_database) +" -> " + dbBackup.toString());
builder.setPositiveButton(R.string.dialog_OK_button, (dialog, whichButton) -> {
if (!Backup.checkPermissionStorage(this)) {
Backup.requestPermission(this);
} else {
if (dbBackup.exists()){
if (!dbBackup.delete()){
Toast.makeText(this,getResources().getString(R.string.toast_delete), Toast.LENGTH_LONG).show();
}
}
try {
new ZipFile(dbBackup).addFolder(intData);
} catch (ZipException e) {
e.printStackTrace();
}
}
});
builder.setNegativeButton(R.string.dialog_NO_button, (dialog, whichButton) -> dialog.cancel());
AlertDialog dialog = builder.create();
dialog.show();
Objects.requireNonNull(dialog.getWindow()).setGravity(Gravity.BOTTOM);
}
public void performRestore(View view) {
File extStorage;
File intData;
intData = new File(Environment.getDataDirectory() + "//data//" + this.getPackageName());
extStorage = Environment.getExternalStoragePublicDirectory(DIRECTORY_DOCUMENTS);
String filesBackup = getResources().getString(R.string.app_name)+".zip";
final File zipFileBackup = new File(extStorage, filesBackup);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage(getResources().getString(R.string.restore_database));
builder.setPositiveButton(R.string.dialog_OK_button, (dialog, whichButton) -> {
if (!Backup.checkPermissionStorage(this)) {
Backup.requestPermission(this);
} else {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
intent.setType("application/zip");
mRestore.launch(intent);
} else {
Backup.zipExtract(this, intData, Uri.fromFile(zipFileBackup));
}
}
});
builder.setNegativeButton(R.string.dialog_NO_button, (dialog, whichButton) -> dialog.cancel());
AlertDialog dialog = builder.create();
dialog.show();
Objects.requireNonNull(dialog.getWindow()).setGravity(Gravity.BOTTOM);
}
}

3
app/src/main/java/org/woheller69/weather/activities/NavigationActivity.java
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@ -169,6 +169,9 @@ public class NavigationActivity extends AppCompatActivity implements OnNavigatio
}else if(itemId==R.id.nav_help) {
intent = new Intent(this, HelpActivity.class);
startActivity(intent);
}else if(itemId==R.id.nav_backuprestore) {
intent = new Intent(this, BackupRestoreActivity.class);
startActivity(intent);
}else if (itemId==R.id.star_on_github){
startActivity(new Intent(Intent.ACTION_VIEW,
Uri.parse(BuildConfig.GITHUB_URL)));