Android DrawerLayout 的使用

主視圖就只有一張背景，新寫一個MainFragment加載進去

MainFragment.java

public class MainFragment extends Fragment {


......

private Toolbar toolbar;

......

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.main_relativelayout, container,false);

/* 這里設置UI，設置按鈕監聽等等 */
/* 為防止單調，顯示放屏幕分辨率和屏幕方向 */
    return rootView;
}

/* 屏幕分辨率 */
private String getScreenRatio(){
    StringBuilder ratio = new StringBuilder("");
    mDisplay = ((WindowManager)getActivity().getSystemService(Context.WINDOW_SERVICE))
            .getDefaultDisplay();/* 先getActivity */
    DisplayMetrics mDisplayMetrics = new DisplayMetrics();
    mDisplay.getMetrics(mDisplayMetrics);
    mDisplay.getSize(mCurrentDisplaySize);/* 豎屏Point(1536, 1964) 橫屏Point(2048, 1452) */
    Log.d("rust","mCurrentDisplaySize  "+ mCurrentDisplaySize);
    int screenWidth = mDisplayMetrics.widthPixels;
    int screenHeight = mDisplayMetrics.heightPixels;
    ratio.append(screenWidth);
    ratio.append(" x ");
    ratio.append(screenHeight);
    return ratio.toString();
}
/* 獲取屏幕方向 */
private void getOrientation() {
    config = getResources().getConfiguration();/* 檢查屏幕方向 */
    if (config.orientation == Configuration.ORIENTATION_LANDSCAPE){
        screenOrientation = "LANDSCAPE";
    } else if (config.orientation == Configuration.ORIENTATION_PORTRAIT) {
        screenOrientation = "PORTRAIT";
    } else {
        screenOrientation = "Unknow";
    }
}


}</pre>

回到MainActivity.java的onCreate方法，把MainFragment加載進去 

mainFragment = new MainFragment();/ 指定一個單獨的Fragment /

......
final FragmentManager fragmentManager = getFragmentManager();/ 加載到root容器 /
   fragmentManager.beginTransaction().add(R.id.root_framelayout, mainFragment).commit();</pre>

同樣在MainActivity.java的onCreate方法中加載一下導航欄 

/ 左抽屜 /
        leftDrawer = (RelativeLayout) findViewById(R.id.left_relative_drawer);


    /* 左列表在左抽屜里 */
    leftList = (ListView) leftDrawer.findViewById(R.id.left_list);

    /* 適配器裝載數據;即初始化導航列表；這里使用SimpleAdapter，加載自定義的LinearLayout作為按鈕 */
    contentLeftAdapter = new SimpleAdapter(this, leftDrawerListData(),
            R.layout.list_item_linearlayout, new String[]{"image","text"},
            new int[]{R.id.image_left_item,R.id.tv_left_item});

    leftList.setAdapter(contentLeftAdapter);

    /* 為list設置ClickListener;DrawerOnItemClickListener定義在下面*/
    leftList.setOnItemClickListener(new DrawerOnItemClickListener());

    imageBtnLeft.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            fragmentManager.beginTransaction()
                    .replace(R.id.root_framelayout, mainFragment)
                    .commit();
            mDrawerLayout.closeDrawer(leftDrawer);
        }
    });

    btnExit.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            btnConfirmExit.setVisibility(View.VISIBLE);
            btnCancelExit.setVisibility(View.VISIBLE);
            btnExit.setVisibility(View.INVISIBLE);
        }
    });

    btnCancelExit.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            btnCancelExit.setVisibility(View.INVISIBLE);
            btnConfirmExit.setVisibility(View.INVISIBLE);
            btnExit.setVisibility(View.VISIBLE);
        }
    });

    btnConfirmExit.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

//                finish();
                android.os.Process.killProcess(android.os.Process.myPid());
            }
        });</pre>

往listview中添加內容的方法 

private List<Map<String, Object>> leftDrawerListData(){
        List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("image", R.drawable.orange01);
        map.put("text", "橘子");
        list.add(map);


    map = new HashMap<String, Object>();
    map.put("image", R.drawable.sixtraveltransportation);
    map.put("text", "路標");
    list.add(map);

    map = new HashMap<String, Object>();
    map.put("image", R.drawable.traintraveltransportation);
    map.put("text", "火車");
    list.add(map);

    map = new HashMap<String, Object>();
    map.put("image", R.drawable.ecologytree);
    map.put("text", "樹苗");
    list.add(map);

    map = new HashMap<String, Object>();
    map.put("image", R.drawable.ecology);
    map.put("text", "插頭");
    list.add(map);

    return list;
}</pre><br />

導航欄按鈕監聽 

private class DrawerOnItemClickListener implements AdapterView.OnItemClickListener{
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            seleteItem(position);/ 按鈕選擇 /
        }
    }


private void seleteItem(int position){
    leftList.setItemChecked(position, true);

    Fragment newFragment = new ContentFragment();/* new 一個子fragment */
    Bundle args = new Bundle();
    args.putInt(ContentFragment.ARG_SHOW_FRAGMENT,position);
    newFragment.setArguments(args);/* 裝載數據 */

    FragmentManager childFragmentManager = getFragmentManager();
    childFragmentManager.beginTransaction()
            .replace(R.id.root_framelayout, newFragment)
            .commit();/* 替換當前fragment */

    /* 最后關閉左側抽屜 */
    mDrawerLayout.closeDrawer(leftDrawer);
}</pre><br />

點擊一下導航欄的按鈕，就會把原來的MainFragment替換掉 

  

DrawerLayout往往和Fragment結合起來使用；布局界面可以更豐富和靈活 

如果跳到另一個Activity，就抽不出MainActivity的DrawerLayout 

  
來自：http://www.cnblogs.com/rustfisher/p/4906502.html