继上篇—FloatActionButton

点击fragment内gridview条目跳一界面

一listview，加一FloatActionButton用来发送短信

public class ChooseMsgActivity extends AppCompatActivity {

    private ListView mLvMsgs;
    private FloatingActionButton mFabToSend;

    private ArrayAdapter<Msg> mAdapter;
    private int mFestivalId;
    private LayoutInflater mInflater;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_choose_msg);
        mFestivalId = getIntent().getIntExtra(FestivalCategoryFragment.ID_FESTIVAL, -1);
        mInflater = LayoutInflater.from(this);
        setTitle(FestivalLab.getInstance().getFestivalById(mFestivalId).getName());
        initView();
        initEvent();
    }

    private void initEvent() {
        mFabToSend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

            }
        });
    }

    private void initView() {
        mLvMsgs = (ListView) findViewById(R.id.lv_listView);
        mFabToSend = (FloatingActionButton) findViewById(R.id.but_float);

        mLvMsgs.setAdapter(mAdapter = new ArrayAdapter<Msg>(this, -1,
                        FestivalLab.getInstance().getMsgsByFestivalId(mFestivalId)) {
                    @Override
                    public View getView(int position, View convertView, ViewGroup parent) {
                        if (convertView == null) {
                            convertView = mInflater.inflate(R.layout.item_msg, parent, false);
                        }
                        TextView tv_content = (TextView) convertView.findViewById(R.id.tv_content);
                        Button btn_send = (Button) convertView.findViewById(R.id.btn_send);
                        tv_content.setText("   " + getItem(position).getContent());
                        btn_send.setOnClickListener(new View.OnClickListener() {
                            @Override
                            public void onClick(View v) {

                            }
                        });
                        return convertView;
                    }
                }
        );
    }
}

布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <ListView
        android:id="@+id/lv_listView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"></ListView>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/but_float"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:src="@mipmap/icon_to_send"
        android:layout_marginBottom="@dimen/fab_margin"
        app:borderWidth="0dp"
        app:backgroundTint="@color/main_color" />
<!--app:borderWidth="0dp"
    解决在5.0以上没有阴影
    android:layout_marginBottom="@dimen/fab_margin"
    在5.0以上默认紧贴-->
</RelativeLayout>

加一values-v21

<resources>
    <dimen name="fab_margin">0dp</dimen>
</resources>

values下为16dp

item_msg布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:id="@+id/tv_content"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="8dp" />

    <Button
        android:id="@+id/btn_send"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="right"
        android:drawableLeft="@mipmap/icon_to_send"
        android:minHeight="0dp"
        android:minWidth="0dp"
        android:text="发送" />
    <!-- android:minHeight="0dp"
        android:minWidth="0dp"
        button 默认有padding的样子比较宽比较高
        减少下这个感觉-->
</LinearLayout>