1 files changed, 193 insertions, 0 deletions
diff --git a/src/com/android/settings/MediaFormat.java b/src/com/android/settings/MediaFormat.java
new file mode 100644
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+++ b/src/com/android/settings/MediaFormat.java
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+/*
+ * Copyright (C) 2008 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.android.settings;
+
+import com.android.internal.widget.LockPatternUtils;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.IMountService;
+import android.os.ServiceManager;
+import android.os.SystemProperties;
+import android.os.Environment;
+import android.text.TextUtils;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.Button;
+
+/**
+ * Confirm and execute a format of the sdcard.
+ * Multiple confirmations are required: first, a general "are you sure
+ * you want to do this?" prompt, followed by a keyguard pattern trace if the user
+ * has defined one, followed by a final strongly-worded "THIS WILL ERASE EVERYTHING
+ * ON THE SD CARD" prompt.  If at any time the phone is allowed to go to sleep, is
+ * locked, et cetera, then the confirmation sequence is abandoned.
+ */
+public class MediaFormat extends Activity {
+
+    private static final int KEYGUARD_REQUEST = 55;
+
+    private LayoutInflater mInflater;
+    private LockPatternUtils mLockUtils;
+
+    private View mInitialView;
+    private Button mInitiateButton;
+
+    private View mFinalView;
+    private Button mFinalButton;
+
+    /** 
+     * The user has gone through the multiple confirmation, so now we go ahead
+     * and invoke the Mount Service to format the SD card.
+     */
+    private Button.OnClickListener mFinalClickListener = new Button.OnClickListener() {
+            public void onClick(View v) {
+                
+                // Those monkeys kept committing suicide, so we add this property
+                // to disable going through with the format
+                if (!TextUtils.isEmpty(SystemProperties.get("ro.monkey"))) {
+                    return;
+                }
+                IMountService service =
+                        IMountService.Stub.asInterface(ServiceManager.getService("mount"));
+                if (service != null) {
+                    try {
+                        service.formatMedia(Environment.getExternalStorageDirectory().toString());
+                    } catch (android.os.RemoteException e) {
+                        // Intentionally blank - there's nothing we can do here
+                        Log.w("MediaFormat", "Unable to invoke IMountService.formatMedia()");
+                    }
+                } else {
+                    Log.w("MediaFormat", "Unable to locate IMountService");
+                }
+            finish();
+            }
+        };
+
+    /**
+     *  Keyguard validation is run using the standard {@link ConfirmLockPattern}
+     * component as a subactivity
+     */
+    private void runKeyguardConfirmation() {
+        final Intent intent = new Intent();
+        intent.setClassName("com.android.settings",
+                "com.android.settings.ConfirmLockPattern");
+        // supply header and footer text in the intent
+        intent.putExtra(ConfirmLockPattern.HEADER_TEXT,
+                getText(R.string.media_format_gesture_prompt));
+        intent.putExtra(ConfirmLockPattern.FOOTER_TEXT,
+                getText(R.string.media_format_gesture_explanation));
+        startActivityForResult(intent, KEYGUARD_REQUEST);
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
+
+        if (requestCode != KEYGUARD_REQUEST) {
+            return;
+        }
+
+        // If the user entered a valid keyguard trace, present the final
+        // confirmation prompt; otherwise, go back to the initial state.
+        if (resultCode == Activity.RESULT_OK) {
+            establishFinalConfirmationState();
+        } else {
+            establishInitialState();
+        }
+    }
+
+    /**
+     * If the user clicks to begin the reset sequence, we next require a
+     * keyguard confirmation if the user has currently enabled one.  If there
+     * is no keyguard available, we simply go to the final confirmation prompt.
+     */
+    private Button.OnClickListener mInitiateListener = new Button.OnClickListener() {
+            public void onClick(View v) {
+                if (mLockUtils.isLockPatternEnabled()) {
+                    runKeyguardConfirmation();
+                } else {
+                    establishFinalConfirmationState();
+                }
+            }
+        };
+
+    /**
+     * Configure the UI for the final confirmation interaction
+     */
+    private void establishFinalConfirmationState() {
+        if (mFinalView == null) {
+            mFinalView = mInflater.inflate(R.layout.media_format_final, null);
+            mFinalButton =
+                    (Button) mFinalView.findViewById(R.id.execute_media_format);
+            mFinalButton.setOnClickListener(mFinalClickListener);
+        }
+
+        setContentView(mFinalView);
+    }
+
+    /**
+     * In its initial state, the activity presents a button for the user to
+     * click in order to initiate a confirmation sequence.  This method is
+     * called from various other points in the code to reset the activity to
+     * this base state.
+     * 
+     * <p>Reinflating views from resources is expensive and prevents us from
+     * caching widget pointers, so we use a single-inflate pattern:  we lazy-
+     * inflate each view, caching all of the widget pointers we'll need at the
+     * time, then simply reuse the inflated views directly whenever we need
+     * to change contents.
+     */
+    private void establishInitialState() {
+        if (mInitialView == null) {
+            mInitialView = mInflater.inflate(R.layout.media_format_primary, null);
+            mInitiateButton =
+                    (Button) mInitialView.findViewById(R.id.initiate_media_format);
+            mInitiateButton.setOnClickListener(mInitiateListener);
+        }
+
+        setContentView(mInitialView);
+    }
+
+    @Override
+    protected void onCreate(Bundle savedState) {
+        super.onCreate(savedState);
+
+        mInitialView = null;
+        mFinalView = null;
+        mInflater = LayoutInflater.from(this);
+        mLockUtils = new LockPatternUtils(getContentResolver());
+
+        establishInitialState();
+    }
+
+    /** Abandon all progress through the confirmation sequence by returning
+     * to the initial view any time the activity is interrupted (e.g. by
+     * idle timeout).
+     */
+    @Override
+    public void onPause() {
+        super.onPause();
+
+        establishInitialState();
+    }
+
+}