# Material Dialogs Welcome. This library was designed to solve a personal problem with my apps, I use AppCompat to use Material theming on versions of Android below Lollipop. However, AppCompat doesn't theme AlertDialogs to use Material on pre-Lollipop. This library allows you to use a consistently Material themed dialog on all versions of Android, along with specific customizations that make it easier to brand the dialog. The code you see below is also found in the sample project. You can download a APK of the sample here: https://github.com/afollestad/material-dialogs/blob/master/sample/sample.apk It's also available on Google Play: https://play.google.com/store/apps/details?id=com.afollestad.materialdialogssample --- ### Basic Dialog Here's a basic example that mimics the dialog you see on Google's Material design guidelines (here: http://www.google.com/design/spec/components/dialogs.html#dialogs-usage). Note that you can always substitute literal strings and string resources for methods that take strings, the same goes for color resources (e.g. `titleColor` and `titleColorRes`). ```java new MaterialDialog.Builder(this) .title("Permissions") .content("This app determines your phone's location and shares it with Google in order to serve personalized alerts to you. This allows for a better overall app experience.") .theme(Theme.LIGHT) // the default is light, so you don't need this line .positiveText("Accept) // the default is 'OK' .negativeText("Decline") // leaving this line out will remove the negative button .build() .show(); ``` On Lollipop (API 21), the Material dialog will automatically match the `positiveColor` (which is used on the positive action button) to the `colorAccent` attribute of your styles.xml theme. --- ### Stacked Buttons If the action text is too long, it will stack the buttons as also seen on Google's Material design guidelines. ```java new MaterialDialog.Builder(this) .title("Permissions") .content("This app determines your phone's location and shares it with Google in order to serve personalized alerts to you. This allows for a better overall app experience.") .positiveText("Turn on speed boost") .negativeText("No thanks") .build() .show(); ``` --- ### Neutral Button You can specify neutral text in addition to the positive and negative text. It will show the neutral action on the far left. ```java new MaterialDialog.Builder(this) .title("Permissions") .content("This app determines your phone's location and shares it with Google in order to serve personalized alerts to you. This allows for a better overall app experience.") .positiveText("Accept") .negativeText("Decline") .neutralText("More info") .build() .show(); ``` --- ### Callbacks To know when the user selects a button, you set a callback. There's three variations of the callback for the action buttons: ```java new MaterialDialog.Builder(this) .callback(new MaterialDialog.SimpleCallback() { @Override public void onPositive(MaterialDialog dialog) { } }); new MaterialDialog.Builder(this) .callback(new MaterialDialog.Callback() { @Override public void onPositive(MaterialDialog dialog) { } @Override public void onNegative(MaterialDialog dialog) { } }); new MaterialDialog.Builder(this) .callback(new MaterialDialog.FullCallback() { @Override public void onPositive(MaterialDialog dialog) { } @Override public void onNegative(MaterialDialog dialog) { } @Override public void onNeutral(MaterialDialog dialog) { } }); ``` You can choose which one to use based on which actions you make visible, and which actions need to trigger an event. If you pass text to an action, it will become visible (not including the positive action which is always visible and will default to 'OK' unless you make the dialog a list dialog). You don't need a callback to make actions visible. But the dialog will not dismiss when an action is pressed if no callback is set for it. --- ### List Dialogs Creating a list dialog only requires passing in an array of strings. The callback (`itemsCallback`) is also very simple. ```java new MaterialDialog.Builder(this) .title("Social Networks") .items(new String[]{"Twitter", "Google+", "Instagram", "Facebook"}) .itemsCallback(new MaterialDialog.ListCallback() { @Override public void onSelection(MaterialDialog dialog, View view, int which, String text) { } }) .build() .show(); ``` --- ## Custom List Dialog Item Layouts The `ItemProcessor` API can be used to use custom list item layouts. See the sample project for an example. --- ### Single Choice List Dialogs Single choice list dialogs are almost identical to regular list dialogs. The only difference is that you use `itemsCallbackSingleChoice` to set a callback rather than `itemsCallback`. That signals the dialog to display radio buttons next to list items. This also makes it so that an action button has to be pressed, tapping a list item won't dismiss the dialog. Note that this means the positive action button callback will be overridden if you specify one. ```java new MaterialDialog.Builder(this) .title("Social Networks") .items(new String[]{"Twitter", "Google+", "Instagram", "Facebook"}) .itemsCallbackSingleChoice(-1, new MaterialDialog.ListCallback() { @Override public void onSelection(MaterialDialog dialog, View view, int which, String text) { } }) .positiveText("Choose") .build() .show(); ``` If you want to preselect an item, pass an index 0 or greater in place of -1 in `itemsCallbackSingleChoice()`. --- ### Multi Choice List Dialogs Multiple choice list dialogs are almost identical to regular list dialogs. The only difference is that you use `itemsCallbackMultiChoice` to set a callback rather than `itemsCallback`. That signals the dialog to display check boxes next to list items, and the callback can return multiple selections. This also makes it so that an action button has to be pressed, tapping a list item won't dismiss the dialog. Note that this means the positive action button callback will be overridden if you specify one. ```java new MaterialDialog.Builder(this) .title("Social Networks") .items(new String[]{"Twitter", "Google+", "Instagram", "Facebook"}) .itemsCallbackMultiChoice(null, new MaterialDialog.ListCallbackMulti() { @Override public void onSelection(MaterialDialog dialog, Integer[] which, String[] text) { } }) .positiveText("Choose") .build() .show(); ``` If you want to preselect item(s), pass an array of indices in place of null in `itemsCallbackSingleChoice()`. For an example, `new Integer[] { 2, 5 }`. --- ### Custom Views Custom views are very easy to implement. To match the dialog show here: http://www.google.com/design/spec/components/dialogs.html#dialogs-behavior ```java new MaterialDialog.Builder(this) .title("Google Wifi") .positiveText("Accept") .customView(R.layout.custom_view) .positiveText("Connect") .positiveColor(Color.parseColor("#03a9f4")) .build() .show(); ``` Where `custom_view.xml` contains a LinearLayout of TextViews, an EditText, and a CheckBox. No padding is used on the top, bottom, left, or right of the root view, that's all stock to the dialog. Note that your custom view's top and bottom margins will be overrided; if your custom view is a ViewGroup (e.g. a LinearLayout or RelativeLayout), then the first and last child's top and bottom will be overided. `MaterialDialog` inserts your view into a `ScrollView` and displays a divider above the action buttons, so don't wrap your custom view in a scroll view and don't worry about it being too long or needing a divider. However, you should avoid making any content that wouldn't belong in a dialog because of its size. --- ### Theming Before Lollipop, theming AlertDialogs was basically impossible without using reflection and custom drawables. Since KitKat, Android became more color neutral but AlertDialogs continued to use Holo Blue for the title and title divider. Lollipop has improved even more, with no colors in the dialog by default other than the action buttons. This library makes theming even easier. Here's a basic example: ```java final int materialRed500 = Color.parseColor("#D50000"); new MaterialDialog.Builder(this) .title("Permissions") .content("This app determines your phone's location and shares it with Google in order to serve personalized alerts to you. This allows for a better overall app experience.") .positiveText("Accept") .negativeText("Decline") .positiveColor(materialRed500) .negativeColor(materialRed500) .neutralColor(materialRed500) .titleAlignment(Alignment.CENTER) .titleColor(materialRed500) .theme(Theme.DARK) .build() .show(); ``` To see more colors that fit the Material design palette, see this page: http://www.google.com/design/spec/style/color.html#color-color-palette --- ### Misc If you need to access a View in the custom view set to a MaterialDialog, you can use `getCustomView()` of MaterialDialog. This is especially useful if you pass a layout resource to the Builder. ```java MaterialDialog dialog = //... initialization via the builder ... View view = dialog.getCustomView(); ``` If you want to get a reference to one of the dialog action buttons (e.g. to enable or disable buttons): ```java MaterialDialog dialog = //... initialization via the builder ... View negative = dialog.getActionButton(DialogAction.NEGATIVE); View neutral = dialog.getActionButton(DialogAction.NEUTRAL); View positive = dialog.getActionButton(DialogAction.POSITIVE); ``` If you want to update the title of a dialog action button (you can pass a string resource ID in place of the literal string, too): ```java MaterialDialog dialog = //... initialization via the builder ... dialog.setActionButton(DialogAction.NEGATIVE, "New Title"); ``` If you want to forcefully hide the action buttons: ```java MaterialDialog dialog new MaterialDialog.Builder(this) // ... other initialization .hideActions() .build(); dialog.show(); // OR dialog.hideActions(); dialog.showActions(); ``` -- ### Maven/Gradle Dependency Coming soon