Java tutorial
/* * Copyright (C) 2015 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 android.support.v7ox.app; import android.content.Context; import android.content.DialogInterface; import android.content.res.TypedArray; import android.database.Cursor; import android.graphics.drawable.Drawable; import android.os.Build; import android.os.Handler; import android.os.Message; import android.support.annotationox.Nullable; import android.support.v4ox.view.ViewCompat; import android.support.v4ox.widget.NestedScrollView; //import android.support.v7ox.appcompat.R; import com.gigigo.permissions.R; import android.text.TextUtils; import android.util.TypedValue; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; import android.view.ViewParent; import android.view.ViewStub; import android.view.Window; import android.view.WindowManager; import android.widget.AbsListView; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.CheckedTextView; import android.widget.CursorAdapter; import android.widget.FrameLayout; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.SimpleCursorAdapter; import android.widget.TextView; import java.lang.ref.WeakReference; import static android.view.ViewGroup.LayoutParams.MATCH_PARENT; class AlertController { private final Context mContext; private final AppCompatDialog mDialog; private final Window mWindow; private CharSequence mTitle; private CharSequence mMessage; private ListView mListView; private View mView; private int mViewLayoutResId; private int mViewSpacingLeft; private int mViewSpacingTop; private int mViewSpacingRight; private int mViewSpacingBottom; private boolean mViewSpacingSpecified = false; private Button mButtonPositive; private CharSequence mButtonPositiveText; private Message mButtonPositiveMessage; private Button mButtonNegative; private CharSequence mButtonNegativeText; private Message mButtonNegativeMessage; private Button mButtonNeutral; private CharSequence mButtonNeutralText; private Message mButtonNeutralMessage; private NestedScrollView mScrollView; private int mIconId = 0; private Drawable mIcon; private ImageView mIconView; private TextView mTitleView; private TextView mMessageView; private View mCustomTitleView; private ListAdapter mAdapter; private int mCheckedItem = -1; private int mAlertDialogLayout; private int mButtonPanelSideLayout; private int mListLayout; private int mMultiChoiceItemLayout; private int mSingleChoiceItemLayout; private int mListItemLayout; private int mButtonPanelLayoutHint = AlertDialog.LAYOUT_HINT_NONE; private Handler mHandler; private final View.OnClickListener mButtonHandler = new View.OnClickListener() { @Override public void onClick(View v) { final Message m; if (v == mButtonPositive && mButtonPositiveMessage != null) { m = Message.obtain(mButtonPositiveMessage); } else if (v == mButtonNegative && mButtonNegativeMessage != null) { m = Message.obtain(mButtonNegativeMessage); } else if (v == mButtonNeutral && mButtonNeutralMessage != null) { m = Message.obtain(mButtonNeutralMessage); } else { m = null; } if (m != null) { m.sendToTarget(); } // Post a message so we dismiss after the above handlers are executed mHandler.obtainMessage(ButtonHandler.MSG_DISMISS_DIALOG, mDialog).sendToTarget(); } }; private static final class ButtonHandler extends Handler { // Button clicks have Message.what as the BUTTON{1,2,3} constant private static final int MSG_DISMISS_DIALOG = 1; private WeakReference<DialogInterface> mDialog; public ButtonHandler(DialogInterface dialog) { mDialog = new WeakReference<>(dialog); } @Override public void handleMessage(Message msg) { switch (msg.what) { case DialogInterface.BUTTON_POSITIVE: case DialogInterface.BUTTON_NEGATIVE: case DialogInterface.BUTTON_NEUTRAL: ((DialogInterface.OnClickListener) msg.obj).onClick(mDialog.get(), msg.what); break; case MSG_DISMISS_DIALOG: ((DialogInterface) msg.obj).dismiss(); } } } public AlertController(Context context, AppCompatDialog di, Window window) { mContext = context; mDialog = di; mWindow = window; mHandler = new ButtonHandler(di); final TypedArray a = context.obtainStyledAttributes(null, R.styleable.AlertDialog, R.attr.alertDialogStyle_ox, 0); mAlertDialogLayout = a.getResourceId(R.styleable.AlertDialog_android_layout, 0); mButtonPanelSideLayout = a.getResourceId(R.styleable.AlertDialog_buttonPanelSideLayout, 0); mListLayout = a.getResourceId(R.styleable.AlertDialog_listLayout, 0); mMultiChoiceItemLayout = a.getResourceId(R.styleable.AlertDialog_multiChoiceItemLayout, 0); mSingleChoiceItemLayout = a.getResourceId(R.styleable.AlertDialog_singleChoiceItemLayout, 0); mListItemLayout = a.getResourceId(R.styleable.AlertDialog_listItemLayout, 0); a.recycle(); } static boolean canTextInput(View v) { if (v.onCheckIsTextEditor()) { return true; } if (!(v instanceof ViewGroup)) { return false; } ViewGroup vg = (ViewGroup) v; int i = vg.getChildCount(); while (i > 0) { i--; v = vg.getChildAt(i); if (canTextInput(v)) { return true; } } return false; } public void installContent() { /* We use a custom title so never request a window title */ mDialog.supportRequestWindowFeature(Window.FEATURE_NO_TITLE); final int contentView = selectContentView(); mDialog.setContentView(contentView); setupView(); } private int selectContentView() { if (mButtonPanelSideLayout == 0) { return mAlertDialogLayout; } if (mButtonPanelLayoutHint == AlertDialog.LAYOUT_HINT_SIDE) { return mButtonPanelSideLayout; } return mAlertDialogLayout; } public void setTitle(CharSequence title) { mTitle = title; if (mTitleView != null) { mTitleView.setText(title); } } /** * @see AlertDialog.Builder#setCustomTitle(View) */ public void setCustomTitle(View customTitleView) { mCustomTitleView = customTitleView; } public void setMessage(CharSequence message) { mMessage = message; if (mMessageView != null) { mMessageView.setText(message); } } /** * Set the view resource to display in the dialog. */ public void setView(int layoutResId) { mView = null; mViewLayoutResId = layoutResId; mViewSpacingSpecified = false; } /** * Set the view to display in the dialog. */ public void setView(View view) { mView = view; mViewLayoutResId = 0; mViewSpacingSpecified = false; } /** * Set the view to display in the dialog along with the spacing around that view */ public void setView(View view, int viewSpacingLeft, int viewSpacingTop, int viewSpacingRight, int viewSpacingBottom) { mView = view; mViewLayoutResId = 0; mViewSpacingSpecified = true; mViewSpacingLeft = viewSpacingLeft; mViewSpacingTop = viewSpacingTop; mViewSpacingRight = viewSpacingRight; mViewSpacingBottom = viewSpacingBottom; } /** * Sets a hint for the best button panel layout. */ public void setButtonPanelLayoutHint(int layoutHint) { mButtonPanelLayoutHint = layoutHint; } /** * Sets a click listener or a message to be sent when the button is clicked. * You only need to pass one of {@code listener} or {@code msg}. * * @param whichButton Which button, can be one of * {@link DialogInterface#BUTTON_POSITIVE}, * {@link DialogInterface#BUTTON_NEGATIVE}, or * {@link DialogInterface#BUTTON_NEUTRAL} * @param text The text to display in positive button. * @param listener The {@link DialogInterface.OnClickListener} to use. * @param msg The {@link Message} to be sent when clicked. */ public void setButton(int whichButton, CharSequence text, DialogInterface.OnClickListener listener, Message msg) { if (msg == null && listener != null) { msg = mHandler.obtainMessage(whichButton, listener); } switch (whichButton) { case DialogInterface.BUTTON_POSITIVE: mButtonPositiveText = text; mButtonPositiveMessage = msg; break; case DialogInterface.BUTTON_NEGATIVE: mButtonNegativeText = text; mButtonNegativeMessage = msg; break; case DialogInterface.BUTTON_NEUTRAL: mButtonNeutralText = text; mButtonNeutralMessage = msg; break; default: throw new IllegalArgumentException("Button does not exist"); } } /** * Specifies the icon to display next to the alert title. * * @param resId the resource identifier of the drawable to use as the icon, * or 0 for no icon */ public void setIcon(int resId) { mIcon = null; mIconId = resId; if (mIconView != null) { if (resId != 0) { mIconView.setVisibility(View.VISIBLE); mIconView.setImageResource(mIconId); } else { mIconView.setVisibility(View.GONE); } } } /** * Specifies the icon to display next to the alert title. * * @param icon the drawable to use as the icon or null for no icon */ public void setIcon(Drawable icon) { mIcon = icon; mIconId = 0; if (mIconView != null) { if (icon != null) { mIconView.setVisibility(View.VISIBLE); mIconView.setImageDrawable(icon); } else { mIconView.setVisibility(View.GONE); } } } /** * @param attrId the attributeId of the theme-specific drawable * to resolve the resourceId for. * * @return resId the resourceId of the theme-specific drawable */ public int getIconAttributeResId(int attrId) { TypedValue out = new TypedValue(); mContext.getTheme().resolveAttribute(attrId, out, true); return out.resourceId; } public ListView getListView() { return mListView; } public Button getButton(int whichButton) { switch (whichButton) { case DialogInterface.BUTTON_POSITIVE: return mButtonPositive; case DialogInterface.BUTTON_NEGATIVE: return mButtonNegative; case DialogInterface.BUTTON_NEUTRAL: return mButtonNeutral; default: return null; } } @SuppressWarnings({ "UnusedDeclaration" }) public boolean onKeyDown(int keyCode, KeyEvent event) { return mScrollView != null && mScrollView.executeKeyEvent(event); } @SuppressWarnings({ "UnusedDeclaration" }) public boolean onKeyUp(int keyCode, KeyEvent event) { return mScrollView != null && mScrollView.executeKeyEvent(event); } /** * Resolves whether a custom or default panel should be used. Removes the * default panel if a custom panel should be used. If the resolved panel is * a view stub, inflates before returning. * * @param customPanel the custom panel * @param defaultPanel the default panel * @return the panel to use */ @Nullable private ViewGroup resolvePanel(@Nullable View customPanel, @Nullable View defaultPanel) { if (customPanel == null) { // Inflate the default panel, if needed. if (defaultPanel instanceof ViewStub) { defaultPanel = ((ViewStub) defaultPanel).inflate(); } return (ViewGroup) defaultPanel; } // Remove the default panel entirely. if (defaultPanel != null) { final ViewParent parent = defaultPanel.getParent(); if (parent instanceof ViewGroup) { ((ViewGroup) parent).removeView(defaultPanel); } } // Inflate the custom panel, if needed. if (customPanel instanceof ViewStub) { customPanel = ((ViewStub) customPanel).inflate(); } return (ViewGroup) customPanel; } private void setupView() { final View parentPanel = mWindow.findViewById(R.id.parentPanel); final View defaultTopPanel = parentPanel.findViewById(R.id.topPanel); final View defaultContentPanel = parentPanel.findViewById(R.id.contentPanel); final View defaultButtonPanel = parentPanel.findViewById(R.id.buttonPanel); // Install custom content before setting up the title or buttons so // that we can handle panel overrides. final ViewGroup customPanel = (ViewGroup) parentPanel.findViewById(R.id.customPanel); setupCustomContent(customPanel); final View customTopPanel = customPanel.findViewById(R.id.topPanel); final View customContentPanel = customPanel.findViewById(R.id.contentPanel); final View customButtonPanel = customPanel.findViewById(R.id.buttonPanel); // Resolve the correct panels and remove the defaults, if needed. final ViewGroup topPanel = resolvePanel(customTopPanel, defaultTopPanel); final ViewGroup contentPanel = resolvePanel(customContentPanel, defaultContentPanel); final ViewGroup buttonPanel = resolvePanel(customButtonPanel, defaultButtonPanel); setupContent(contentPanel); setupButtons(buttonPanel); setupTitle(topPanel); final boolean hasCustomPanel = customPanel != null && customPanel.getVisibility() != View.GONE; final boolean hasTopPanel = topPanel != null && topPanel.getVisibility() != View.GONE; final boolean hasButtonPanel = buttonPanel != null && buttonPanel.getVisibility() != View.GONE; // Only display the text spacer if we don't have buttons. if (!hasButtonPanel) { if (contentPanel != null) { final View spacer = contentPanel.findViewById(R.id.textSpacerNoButtons); if (spacer != null) { spacer.setVisibility(View.VISIBLE); } } } if (hasTopPanel) { // Only clip scrolling content to padding if we have a title. if (mScrollView != null) { mScrollView.setClipToPadding(true); } } // Update scroll indicators as needed. if (!hasCustomPanel) { final View content = mListView != null ? mListView : mScrollView; if (content != null) { final int indicators = (hasTopPanel ? ViewCompat.SCROLL_INDICATOR_TOP : 0) | (hasButtonPanel ? ViewCompat.SCROLL_INDICATOR_BOTTOM : 0); setScrollIndicators(contentPanel, content, indicators, ViewCompat.SCROLL_INDICATOR_TOP | ViewCompat.SCROLL_INDICATOR_BOTTOM); } } final ListView listView = mListView; if (listView != null && mAdapter != null) { listView.setAdapter(mAdapter); final int checkedItem = mCheckedItem; if (checkedItem > -1) { listView.setItemChecked(checkedItem, true); listView.setSelection(checkedItem); } } } private void setScrollIndicators(ViewGroup contentPanel, View content, final int indicators, final int mask) { // Set up scroll indicators (if present). View indicatorUp = mWindow.findViewById(R.id.scrollIndicatorUp); View indicatorDown = mWindow.findViewById(R.id.scrollIndicatorDown); if (Build.VERSION.SDK_INT >= 23) { // We're on Marshmallow so can rely on the View APIs ViewCompat.setScrollIndicators(content, indicators, mask); // We can also remove the compat indicator views if (indicatorUp != null) { contentPanel.removeView(indicatorUp); } if (indicatorDown != null) { contentPanel.removeView(indicatorDown); } } else { // First, remove the indicator views if we're not set to use them if (indicatorUp != null && (indicators & ViewCompat.SCROLL_INDICATOR_TOP) == 0) { contentPanel.removeView(indicatorUp); indicatorUp = null; } if (indicatorDown != null && (indicators & ViewCompat.SCROLL_INDICATOR_BOTTOM) == 0) { contentPanel.removeView(indicatorDown); indicatorDown = null; } if (indicatorUp != null || indicatorDown != null) { final View top = indicatorUp; final View bottom = indicatorDown; if (mMessage != null) { // We're just showing the ScrollView, set up listener. mScrollView.setOnScrollChangeListener(new NestedScrollView.OnScrollChangeListener() { @Override public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) { manageScrollIndicators(v, top, bottom); } }); // Set up the indicators following layout. mScrollView.post(new Runnable() { @Override public void run() { manageScrollIndicators(mScrollView, top, bottom); } }); } else if (mListView != null) { // We're just showing the AbsListView, set up listener. mListView.setOnScrollListener(new AbsListView.OnScrollListener() { @Override public void onScrollStateChanged(AbsListView view, int scrollState) { } @Override public void onScroll(AbsListView v, int firstVisibleItem, int visibleItemCount, int totalItemCount) { manageScrollIndicators(v, top, bottom); } }); // Set up the indicators following layout. mListView.post(new Runnable() { @Override public void run() { manageScrollIndicators(mListView, top, bottom); } }); } else { // We don't have any content to scroll, remove the indicators. if (top != null) { contentPanel.removeView(top); } if (bottom != null) { contentPanel.removeView(bottom); } } } } } private void setupCustomContent(ViewGroup customPanel) { final View customView; if (mView != null) { customView = mView; } else if (mViewLayoutResId != 0) { final LayoutInflater inflater = LayoutInflater.from(mContext); customView = inflater.inflate(mViewLayoutResId, customPanel, false); } else { customView = null; } final boolean hasCustomView = customView != null; if (!hasCustomView || !canTextInput(customView)) { mWindow.setFlags(WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM, WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM); } if (hasCustomView) { final FrameLayout custom = (FrameLayout) mWindow.findViewById(R.id.custom); custom.addView(customView, new LayoutParams(MATCH_PARENT, MATCH_PARENT)); if (mViewSpacingSpecified) { custom.setPadding(mViewSpacingLeft, mViewSpacingTop, mViewSpacingRight, mViewSpacingBottom); } if (mListView != null) { ((LinearLayout.LayoutParams) customPanel.getLayoutParams()).weight = 0; } } else { customPanel.setVisibility(View.GONE); } } private void setupTitle(ViewGroup topPanel) { if (mCustomTitleView != null) { // Add the custom title view directly to the topPanel layout LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT); topPanel.addView(mCustomTitleView, 0, lp); // Hide the title template View titleTemplate = mWindow.findViewById(R.id.title_template); titleTemplate.setVisibility(View.GONE); } else { mIconView = (ImageView) mWindow.findViewById(android.R.id.icon); final boolean hasTextTitle = !TextUtils.isEmpty(mTitle); if (hasTextTitle) { // Display the title if a title is supplied, else hide it. mTitleView = (TextView) mWindow.findViewById(R.id.alertTitle); mTitleView.setText(mTitle); // Do this last so that if the user has supplied any icons we // use them instead of the default ones. If the user has // specified 0 then make it disappear. if (mIconId != 0) { mIconView.setImageResource(mIconId); } else if (mIcon != null) { mIconView.setImageDrawable(mIcon); } else { // Apply the padding from the icon to ensure the title is // aligned correctly. mTitleView.setPadding(mIconView.getPaddingLeft(), mIconView.getPaddingTop(), mIconView.getPaddingRight(), mIconView.getPaddingBottom()); mIconView.setVisibility(View.GONE); } } else { // Hide the title template final View titleTemplate = mWindow.findViewById(R.id.title_template); titleTemplate.setVisibility(View.GONE); mIconView.setVisibility(View.GONE); topPanel.setVisibility(View.GONE); } } } private void setupContent(ViewGroup contentPanel) { mScrollView = (NestedScrollView) mWindow.findViewById(R.id.scrollView); mScrollView.setFocusable(false); mScrollView.setNestedScrollingEnabled(false); // Special case for users that only want to display a String mMessageView = (TextView) contentPanel.findViewById(android.R.id.message); if (mMessageView == null) { return; } if (mMessage != null) { mMessageView.setText(mMessage); } else { mMessageView.setVisibility(View.GONE); mScrollView.removeView(mMessageView); if (mListView != null) { final ViewGroup scrollParent = (ViewGroup) mScrollView.getParent(); final int childIndex = scrollParent.indexOfChild(mScrollView); scrollParent.removeViewAt(childIndex); scrollParent.addView(mListView, childIndex, new LayoutParams(MATCH_PARENT, MATCH_PARENT)); } else { contentPanel.setVisibility(View.GONE); } } } private static void manageScrollIndicators(View v, View upIndicator, View downIndicator) { if (upIndicator != null) { upIndicator.setVisibility(ViewCompat.canScrollVertically(v, -1) ? View.VISIBLE : View.INVISIBLE); } if (downIndicator != null) { downIndicator.setVisibility(ViewCompat.canScrollVertically(v, 1) ? View.VISIBLE : View.INVISIBLE); } } private void setupButtons(ViewGroup buttonPanel) { int BIT_BUTTON_POSITIVE = 1; int BIT_BUTTON_NEGATIVE = 2; int BIT_BUTTON_NEUTRAL = 4; int whichButtons = 0; mButtonPositive = (Button) buttonPanel.findViewById(android.R.id.button1); mButtonPositive.setOnClickListener(mButtonHandler); if (TextUtils.isEmpty(mButtonPositiveText)) { mButtonPositive.setVisibility(View.GONE); } else { mButtonPositive.setText(mButtonPositiveText); mButtonPositive.setVisibility(View.VISIBLE); whichButtons = whichButtons | BIT_BUTTON_POSITIVE; } mButtonNegative = (Button) buttonPanel.findViewById(android.R.id.button2); mButtonNegative.setOnClickListener(mButtonHandler); if (TextUtils.isEmpty(mButtonNegativeText)) { mButtonNegative.setVisibility(View.GONE); } else { mButtonNegative.setText(mButtonNegativeText); mButtonNegative.setVisibility(View.VISIBLE); whichButtons = whichButtons | BIT_BUTTON_NEGATIVE; } mButtonNeutral = (Button) buttonPanel.findViewById(android.R.id.button3); mButtonNeutral.setOnClickListener(mButtonHandler); if (TextUtils.isEmpty(mButtonNeutralText)) { mButtonNeutral.setVisibility(View.GONE); } else { mButtonNeutral.setText(mButtonNeutralText); mButtonNeutral.setVisibility(View.VISIBLE); whichButtons = whichButtons | BIT_BUTTON_NEUTRAL; } final boolean hasButtons = whichButtons != 0; if (!hasButtons) { buttonPanel.setVisibility(View.GONE); } } public static class AlertParams { public final Context mContext; public final LayoutInflater mInflater; public int mIconId = 0; public Drawable mIcon; public int mIconAttrId = 0; public CharSequence mTitle; public View mCustomTitleView; public CharSequence mMessage; public CharSequence mPositiveButtonText; public DialogInterface.OnClickListener mPositiveButtonListener; public CharSequence mNegativeButtonText; public DialogInterface.OnClickListener mNegativeButtonListener; public CharSequence mNeutralButtonText; public DialogInterface.OnClickListener mNeutralButtonListener; public boolean mCancelable; public DialogInterface.OnCancelListener mOnCancelListener; public DialogInterface.OnDismissListener mOnDismissListener; public DialogInterface.OnKeyListener mOnKeyListener; public CharSequence[] mItems; public ListAdapter mAdapter; public DialogInterface.OnClickListener mOnClickListener; public int mViewLayoutResId; public View mView; public int mViewSpacingLeft; public int mViewSpacingTop; public int mViewSpacingRight; public int mViewSpacingBottom; public boolean mViewSpacingSpecified = false; public boolean[] mCheckedItems; public boolean mIsMultiChoice; public boolean mIsSingleChoice; public int mCheckedItem = -1; public DialogInterface.OnMultiChoiceClickListener mOnCheckboxClickListener; public Cursor mCursor; public String mLabelColumn; public String mIsCheckedColumn; public boolean mForceInverseBackground; public AdapterView.OnItemSelectedListener mOnItemSelectedListener; public OnPrepareListViewListener mOnPrepareListViewListener; public boolean mRecycleOnMeasure = true; /** * Interface definition for a callback to be invoked before the ListView * will be bound to an adapter. */ public interface OnPrepareListViewListener { /** * Called before the ListView is bound to an adapter. * @param listView The ListView that will be shown in the dialog. */ void onPrepareListView(ListView listView); } public AlertParams(Context context) { mContext = context; mCancelable = true; mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); } public void apply(AlertController dialog) { if (mCustomTitleView != null) { dialog.setCustomTitle(mCustomTitleView); } else { if (mTitle != null) { dialog.setTitle(mTitle); } if (mIcon != null) { dialog.setIcon(mIcon); } if (mIconId != 0) { dialog.setIcon(mIconId); } if (mIconAttrId != 0) { dialog.setIcon(dialog.getIconAttributeResId(mIconAttrId)); } } if (mMessage != null) { dialog.setMessage(mMessage); } if (mPositiveButtonText != null) { dialog.setButton(DialogInterface.BUTTON_POSITIVE, mPositiveButtonText, mPositiveButtonListener, null); } if (mNegativeButtonText != null) { dialog.setButton(DialogInterface.BUTTON_NEGATIVE, mNegativeButtonText, mNegativeButtonListener, null); } if (mNeutralButtonText != null) { dialog.setButton(DialogInterface.BUTTON_NEUTRAL, mNeutralButtonText, mNeutralButtonListener, null); } // For a list, the client can either supply an array of items or an // adapter or a cursor if ((mItems != null) || (mCursor != null) || (mAdapter != null)) { createListView(dialog); } if (mView != null) { if (mViewSpacingSpecified) { dialog.setView(mView, mViewSpacingLeft, mViewSpacingTop, mViewSpacingRight, mViewSpacingBottom); } else { dialog.setView(mView); } } else if (mViewLayoutResId != 0) { dialog.setView(mViewLayoutResId); } /* dialog.setCancelable(mCancelable); dialog.setOnCancelListener(mOnCancelListener); if (mOnKeyListener != null) { dialog.setOnKeyListener(mOnKeyListener); } */ } private void createListView(final AlertController dialog) { final ListView listView = (ListView) mInflater.inflate(dialog.mListLayout, null); final ListAdapter adapter; if (mIsMultiChoice) { if (mCursor == null) { adapter = new ArrayAdapter<CharSequence>(mContext, dialog.mMultiChoiceItemLayout, android.R.id.text1, mItems) { @Override public View getView(int position, View convertView, ViewGroup parent) { View view = super.getView(position, convertView, parent); if (mCheckedItems != null) { boolean isItemChecked = mCheckedItems[position]; if (isItemChecked) { listView.setItemChecked(position, true); } } return view; } }; } else { adapter = new CursorAdapter(mContext, mCursor, false) { private final int mLabelIndex; private final int mIsCheckedIndex; { final Cursor cursor = getCursor(); mLabelIndex = cursor.getColumnIndexOrThrow(mLabelColumn); mIsCheckedIndex = cursor.getColumnIndexOrThrow(mIsCheckedColumn); } @Override public void bindView(View view, Context context, Cursor cursor) { CheckedTextView text = (CheckedTextView) view.findViewById(android.R.id.text1); text.setText(cursor.getString(mLabelIndex)); listView.setItemChecked(cursor.getPosition(), cursor.getInt(mIsCheckedIndex) == 1); } @Override public View newView(Context context, Cursor cursor, ViewGroup parent) { return mInflater.inflate(dialog.mMultiChoiceItemLayout, parent, false); } }; } } else { final int layout; if (mIsSingleChoice) { layout = dialog.mSingleChoiceItemLayout; } else { layout = dialog.mListItemLayout; } if (mCursor != null) { adapter = new SimpleCursorAdapter(mContext, layout, mCursor, new String[] { mLabelColumn }, new int[] { android.R.id.text1 }); } else if (mAdapter != null) { adapter = mAdapter; } else { adapter = new CheckedItemAdapter(mContext, layout, android.R.id.text1, mItems); } } if (mOnPrepareListViewListener != null) { mOnPrepareListViewListener.onPrepareListView(listView); } /* Don't directly set the adapter on the ListView as we might * want to add a footer to the ListView later. */ dialog.mAdapter = adapter; dialog.mCheckedItem = mCheckedItem; if (mOnClickListener != null) { listView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View v, int position, long id) { mOnClickListener.onClick(dialog.mDialog, position); if (!mIsSingleChoice) { dialog.mDialog.dismiss(); } } }); } else if (mOnCheckboxClickListener != null) { listView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View v, int position, long id) { if (mCheckedItems != null) { mCheckedItems[position] = listView.isItemChecked(position); } mOnCheckboxClickListener.onClick(dialog.mDialog, position, listView.isItemChecked(position)); } }); } // Attach a given OnItemSelectedListener to the ListView if (mOnItemSelectedListener != null) { listView.setOnItemSelectedListener(mOnItemSelectedListener); } if (mIsSingleChoice) { listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE); } else if (mIsMultiChoice) { listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE); } dialog.mListView = listView; } } private static class CheckedItemAdapter extends ArrayAdapter<CharSequence> { public CheckedItemAdapter(Context context, int resource, int textViewResourceId, CharSequence[] objects) { super(context, resource, textViewResourceId, objects); } @Override public boolean hasStableIds() { return true; } @Override public long getItemId(int position) { return position; } } }