src/com/android/phone/DeleteFdnContactScreen.java

/*
 * Copyright (C) 2006 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.phone;

import android.app.Activity;
import android.content.AsyncQueryHandler;
import android.content.ContentResolver;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.text.TextUtils;
import android.util.Log;
import android.view.Window;
import android.widget.Toast;

import static android.view.Window.PROGRESS_VISIBILITY_OFF;
import static android.view.Window.PROGRESS_VISIBILITY_ON;

/**
 * Activity to let the user delete an FDN contact.
 */
public class DeleteFdnContactScreen extends Activity {
    private static final String LOG_TAG = PhoneGlobals.LOG_TAG;
    private static final boolean DBG = false;

    private static final String INTENT_EXTRA_NAME = "name";
    private static final String INTENT_EXTRA_NUMBER = "number";

    private static final int PIN2_REQUEST_CODE = 100;

    private String mName;
    private String mNumber;
    private String mPin2;

    protected QueryHandler mQueryHandler;

    private Handler mHandler = new Handler();

    @Override
    protected void onCreate(Bundle icicle) {
        super.onCreate(icicle);

        resolveIntent();

        authenticatePin2();

        getWindow().requestFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
        setContentView(R.layout.delete_fdn_contact_screen);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        if (DBG) log("onActivityResult");

        switch (requestCode) {
            case PIN2_REQUEST_CODE:
                Bundle extras = (intent != null) ? intent.getExtras() : null;
                if (extras != null) {
                    mPin2 = extras.getString("pin2");
                    showStatus(getResources().getText(
                            R.string.deleting_fdn_contact));
                    deleteContact();
                } else {
                    // if they cancelled, then we just cancel too.
                    if (DBG) log("onActivityResult: CANCELLED");
                    displayProgress(false);
                    finish();
                }
                break;
        }
    }

    private void resolveIntent() {
        Intent intent = getIntent();

        mName =  intent.getStringExtra(INTENT_EXTRA_NAME);
        mNumber =  intent.getStringExtra(INTENT_EXTRA_NUMBER);

        if (TextUtils.isEmpty(mNumber)) {
            finish();
        }
    }

    private void deleteContact() {
        StringBuilder buf = new StringBuilder();
        if (TextUtils.isEmpty(mName)) {
            buf.append("number='");
        } else {
            buf.append("tag='");
            buf.append(mName);
            buf.append("' AND number='");
        }
        buf.append(mNumber);
        buf.append("' AND pin2='");
        buf.append(mPin2);
        buf.append("'");

        Uri uri = Uri.parse("content://icc/fdn");

        mQueryHandler = new QueryHandler(getContentResolver());
        mQueryHandler.startDelete(0, null, uri, buf.toString(), null);
        displayProgress(true);
    }

    private void authenticatePin2() {
        Intent intent = new Intent();
        intent.setClass(this, GetPin2Screen.class);
        startActivityForResult(intent, PIN2_REQUEST_CODE);
    }

    private void displayProgress(boolean flag) {
        getWindow().setFeatureInt(
                Window.FEATURE_INDETERMINATE_PROGRESS,
                flag ? PROGRESS_VISIBILITY_ON : PROGRESS_VISIBILITY_OFF);
    }

    // Replace the status field with a toast to make things appear similar
    // to the rest of the settings.  Removed the useless status field.
    private void showStatus(CharSequence statusMsg) {
        if (statusMsg != null) {
            Toast.makeText(this, statusMsg, Toast.LENGTH_SHORT)
            .show();
        }
    }

    private void handleResult(boolean success) {
        if (success) {
            if (DBG) log("handleResult: success!");
            showStatus(getResources().getText(R.string.fdn_contact_deleted));
        } else {
            if (DBG) log("handleResult: failed!");
            showStatus(getResources().getText(R.string.pin2_invalid));
        }

        mHandler.postDelayed(new Runnable() {
            @Override
            public void run() {
                finish();
            }
        }, 2000);

    }

    private class QueryHandler extends AsyncQueryHandler {
        public QueryHandler(ContentResolver cr) {
            super(cr);
        }

        @Override
        protected void onQueryComplete(int token, Object cookie, Cursor c) {
        }

        @Override
        protected void onInsertComplete(int token, Object cookie, Uri uri) {
        }

        @Override
        protected void onUpdateComplete(int token, Object cookie, int result) {
        }

        @Override
        protected void onDeleteComplete(int token, Object cookie, int result) {
            if (DBG) log("onDeleteComplete");
            displayProgress(false);
            handleResult(result > 0);
        }

    }

    private void log(String msg) {
        Log.d(LOG_TAG, "[DeleteFdnContact] " + msg);
    }
}