自定义Dialog之底部弹出Dialog

先预览下效果：

自定义Dialog，设置Dialog居于底部并且和屏幕一样宽：

public class BottomStyleDialog extends Dialog implements OnItemClickListener {

    private String[] mNames = new String[] {
            "我是条目1", "我是条目2", "我是条目3", "我是条目4", "我是条目5","我是条目6","我是条目7"
    };

    private ListView mLv;

    private ArrayList<StyleItem> mList = new ArrayList<StyleItem>();

    private StyleAdapter mAdapter;

    public BottomStyleDialog(Context context) {
        // 在构造方法里, 传入主题
        super(context, R.style.BottomDialogStyle);
        // 拿到Dialog的Window, 修改Window的属性
        Window window = getWindow();
        window.getDecorView().setPadding(0, 0, 0, 0);
        // 获取Window的LayoutParams
        LayoutParams attributes = window.getAttributes();
        attributes.width = LayoutParams.MATCH_PARENT;
        attributes.gravity = Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL;
        // 一定要重新设置, 才能生效
        window.setAttributes(attributes);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.view_dialog);
        initView();
        initData();
    }

    private void initView() {
        mLv = (ListView) findViewById(R.id.lv_view_dialog);
        mLv.setOnItemClickListener(this);
    }

    private void initData() {
        // 填充数据集合
        for (int i = 0; i < mNames.length; i++) {
            StyleItem styleItem = new StyleItem();
            styleItem.mName = mNames[i];
            mList.add(styleItem);
        }
        mAdapter = new StyleAdapter(getContext(), mList);
        mLv.setAdapter(mAdapter);
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        mAdapter.notifyDataSetChanged();
    }
}

styles中定义Dialog的样式及其进入和退出动画

<!-- 自定义Dialog主题 -->
<style name="BottomDialogStyle" parent="@android:style/Theme.Dialog">
<item name="android:windowNoTitle">true</item>
<item name="android:windowBackground">@android:color/white</item>
<item name="android:windowAnimationStyle">@style/BottomDialogAnimation</item>
</style>

<!-- 自定义Dialog动画 -->
<style name="BottomDialogAnimation">
<item name="android:windowEnterAnimation">@anim/input_method_enter</item>
<item name="android:windowExitAnimation">@anim/input_method_exit</item>
</style>

Dialog中使用的Adapter：

public class StyleAdapter extends BaseAdapter {

    private Context mContext;

    private ArrayList<StyleItem> mList;

    public StyleAdapter(Context context, ArrayList<StyleItem> list) {
        mContext = context;
        mList = list;
    }

    @Override
    public int getCount() {
        return mList.size();
    }

    @Override
    public StyleItem getItem(int position) {
        return mList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            convertView = View.inflate(mContext, R.layout.item_dialog_style, null);
            holder = new ViewHolder();
            holder.tvName = (TextView) convertView.findViewById(R.id.tv_item_dialog_name);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        StyleItem item = getItem(position);
        holder.tvName.setText(item.mName);
        return convertView;
    }

    static class ViewHolder {
        TextView tvName;
    }
}

点击展示Dialog

BottomStyleDialog bottomStyleDialog = new BottomStyleDialog(MainActivity.this);
bottomStyleDialog.show();

代码GitHub地址