1 – Create a New Project on Google Developer Console
2 – Enable Google Drive API
Then :
build.gradle
compile 'com.google.android.gms:play-services-drive:10.2.1'
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="ir.mhdr.a068">
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<meta-data android:name="com.google.android.gms.games.APP_ID" android:value="@string/app_id" />
<meta-data android:name="com.google.android.gms.appstate.APP_ID" android:value="@string/app_id" />
<meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version"/>
</application>
</manifest>
MainActivity.java
public class MainActivity extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener {
private static final int REQUEST_CODE_CREATOR = 1;
private static final int REQUEST_CODE_RESOLUTION = 2;
private GoogleApiClient mGoogleApiClient;
Button buttonSave;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
buttonSave= (Button) findViewById(R.id.buttonSave);
buttonSave.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
saveFileToDrive();
}
});
}
@Override
protected void onResume() {
super.onResume();
if (mGoogleApiClient == null) {
// Create the API client and bind it to an instance variable.
// We use this instance as the callback for connection and connection
// failures.
// Since no account name is passed, the user is prompted to choose.
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(Drive.API)
.addScope(Drive.SCOPE_FILE)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
}
mGoogleApiClient.connect();
}
@Override
protected void onPause() {
if (mGoogleApiClient != null) {
mGoogleApiClient.disconnect();
}
super.onPause();
}
@Override
public void onConnected(@Nullable Bundle bundle) {
Toast.makeText(getApplicationContext(), "Connected", Toast.LENGTH_LONG).show();
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(ConnectionResult result) {
// Called whenever the API client fails to connect.
if (!result.hasResolution()) {
// show the localized error dialog.
GoogleApiAvailability.getInstance().getErrorDialog(this, result.getErrorCode(), 0).show();
return;
}
// The failure has a resolution. Resolve it.
// Called typically when the app is not yet authorized, and an
// authorization
// dialog is displayed to the user.
try {
result.startResolutionForResult(this, REQUEST_CODE_RESOLUTION);
} catch (IntentSender.SendIntentException e) {
e.printStackTrace();
}
}
/**
* Create a new file and save it to Drive.
*/
private void saveFileToDrive() {
// Start by creating a new contents, and setting a callback.
Drive.DriveApi.newDriveContents(mGoogleApiClient)
.setResultCallback(new ResultCallback<DriveApi.DriveContentsResult>() {
@Override
public void onResult(DriveApi.DriveContentsResult result) {
// If the operation was not successful, we cannot do anything and must fail
if (!result.getStatus().isSuccess()) {
return;
}
// Otherwise, we can write our data to the new contents.
// Get an output stream for the contents.
OutputStream outputStream = result.getDriveContents().getOutputStream();
Writer writer=new OutputStreamWriter(outputStream);
try {
writer.write("Hello World");
writer.flush();
writer.close();
} catch (IOException e1) {
e1.printStackTrace();
}
// Create the initial metadata - MIME type and title.
// Note that the user will be able to change the title later.
MetadataChangeSet metadataChangeSet = new MetadataChangeSet
.Builder()
.setMimeType("text/plain")
.setTitle("Hello.txt")
.setStarred(true)
.build();
// Create an intent for the file chooser, and start it.
IntentSender intentSender = Drive.DriveApi
.newCreateFileActivityBuilder()
.setInitialMetadata(metadataChangeSet)
.setInitialDriveContents(result.getDriveContents())
.build(mGoogleApiClient);
try {
startIntentSenderForResult(
intentSender, REQUEST_CODE_CREATOR, null, 0, 0, 0);
} catch (IntentSender.SendIntentException e) {
e.printStackTrace();
}
}
});
}
}
References
https://github.com/mhdr/AndroidSamples/tree/master/068
MainActivity.java