Android 在 Google Drive SDK 中打开和保存文件

Android 在 Google Drive SDK 中打开和保存文件

dependencies {
    implementation 'com.google.android.gms:play-services-drive:17.0.0'
}

xml

java
GoogleSignInOptions signInOptions = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
        .requestScopes(Drive.SCOPE_FILE)
        .build();
GoogleSignInClient googleSignInClient = GoogleSignIn.getClient(this, signInOptions);

java
Intent signInIntent = googleSignInClient.getSignInIntent();
startActivityForResult(signInIntent, REQUEST_CODE_SIGN_IN);

java
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == REQUEST_CODE_SIGN_IN && resultCode == RESULT_OK) {
        Task task = GoogleSignIn.getSignedInAccountFromIntent(data);
        handleSignInResult(task);
    }
}
private void handleSignInResult(Task completedTask) {
    try {
        GoogleSignInAccount account = completedTask.getResult(ApiException.class);
        // 用户已登录成功，可以使用 account 对象访问用户的 Google 账号信息
    } catch (ApiException e) {
        // 登录失败
    }
}

java
GoogleAccountCredential credential = GoogleAccountCredential.usingOAuth2(
        this, Collections.singleton(DriveScopes.DRIVE_FILE));
credential.setSelectedAccount(account.getAccount());
DriveClient driveClient = Drive.getDriveClient(this, credential);

java
IntentSender intentSender = driveClient.newOpenFileActivityIntentSender(new OpenFileActivityOptions.Builder()
        .setMimeType(new String[] { "text/plain" })
        .build());
startIntentSenderForResult(intentSender, REQUEST_CODE_OPEN_FILE, null, 0, 0, 0);

java
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == REQUEST_CODE_OPEN_FILE && resultCode == RESULT_OK) {
        DriveId driveId = data.getParcelableExtra(OpenFileActivityOptions.EXTRA_RESPONSE_DRIVE_ID);
        // 获取到文件的 DriveId，可以使用该对象访问文件的内容
    }
}

java
DriveContents driveContents = DriveContents.create();

java
OutputStream outputStream = driveContents.getOutputStream();
try {
    outputStream.write("Hello, Drive!".getBytes());
} catch (IOException e) {
    // 写入文件失败
} finally {
    try {
        outputStream.close();
    } catch (IOException e) {
        // 关闭输出流失败
    }
}

java
MetadataChangeSet changeSet = new MetadataChangeSet.Builder()
        .setTitle("MyFile.txt")
        .setMimeType("text/plain")
        .setStarred(true)
        .build();

java
driveClient.createFile(folder, changeSet, driveContents)
        .addOnSuccessListener(this, driveFile -> {
            // 文件保存成功
        })
        .addOnFailureListener(this, e -> {
            // 文件保存失败
        });