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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.obbapp;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.os.storage.OnObbStateChangeListener;
import android.os.storage.StorageManager;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import java.io.File;
/**
* This class provides a basic demonstration of how to manage an OBB file. It
* provides two buttons: one to mount an OBB and another to unmount an OBB. The
* main feature is that it implements an OnObbStateChangeListener which updates
* some text fields with relevant information.
*/
public class ObbMountActivity extends Activity {
private static final String TAG = "ObbMount";
private static String mObbPath;
private TextView mStatus;
private TextView mPath;
private StorageManager mSM;
/** Called with the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Inflate our UI from its XML layout description.
setContentView(R.layout.obb_mount_activity);
// Hook up button presses to the appropriate event handler.
((Button) findViewById(R.id.mount)).setOnClickListener(mMountListener);
((Button) findViewById(R.id.unmount)).setOnClickListener(mUnmountListener);
// Text indications of current status
mStatus = (TextView) findViewById(R.id.status);
mPath = (TextView) findViewById(R.id.path);
ObbState state = (ObbState) getLastNonConfigurationInstance();
if (state != null) {
mSM = state.storageManager;
mStatus.setText(state.status);
mPath.setText(state.path);
} else {
// Get an instance of the StorageManager
mSM = (StorageManager) getApplicationContext().getSystemService(STORAGE_SERVICE);
}
mObbPath = new File(Environment.getExternalStorageDirectory(), "test1.obb").getPath();
}
OnObbStateChangeListener mEventListener = new OnObbStateChangeListener() {
@Override
public void onObbStateChange(String path, int state) {
Log.d(TAG, "path=" + path + "; state=" + state);
mStatus.setText(String.valueOf(state));
if (state == OnObbStateChangeListener.MOUNTED) {
mPath.setText(mSM.getMountedObbPath(mObbPath));
} else {
mPath.setText("");
}
}
};
/**
* A call-back for when the user presses the back button.
*/
OnClickListener mMountListener = new OnClickListener() {
public void onClick(View v) {
try {
// We don't need to synchronize here to avoid clobbering the
// content of mStatus because the callback comes to our main
// looper.
if (mSM.mountObb(mObbPath, null, mEventListener)) {
mStatus.setText(R.string.attempting_mount);
} else {
mStatus.setText(R.string.failed_to_start_mount);
}
} catch (IllegalArgumentException e) {
mStatus.setText(R.string.obb_already_mounted);
Log.d(TAG, "OBB already mounted");
}
}
};
/**
* A call-back for when the user presses the clear button.
*/
OnClickListener mUnmountListener = new OnClickListener() {
public void onClick(View v) {
try {
if (mSM.unmountObb(mObbPath, false, mEventListener)) {
mStatus.setText(R.string.attempting_unmount);
} else {
mStatus.setText(R.string.failed_to_start_unmount);
}
} catch (IllegalArgumentException e) {
mStatus.setText(R.string.obb_not_mounted);
Log.d(TAG, "OBB not mounted");
}
}
};
@Override
public Object onRetainNonConfigurationInstance() {
// Since our OBB mount is tied to the StorageManager, retain it
ObbState state = new ObbState(mSM, mStatus.getText(), mPath.getText());
return state;
}
private static class ObbState {
public StorageManager storageManager;
public CharSequence status;
public CharSequence path;
ObbState(StorageManager storageManager, CharSequence status, CharSequence path) {
this.storageManager = storageManager;
this.status = status;
this.path = path;
}
}
}
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