上面影片就是Tabbed Activity效果,準備弄個漂亮的介面來寫擷取和錄製Screen的APP
A.
android studio新增Tabbed Activity
B.
public boolean onCreateOptionsMenu(Menu menu)這個methoid 會產生menu表單
要新增menu item在在menu目錄下menu_main.xml來新增(如下圖)
public boolean onOptionsItemSelected(MenuItem item) 處理選單事件
C.
mViewPager.addOnPageChangeListener(...)這是額外加上,處理ViewPaber更改頁面事件,譬如來更改toolbar的title,icon
D.
Fragment:
public View onCreateView(....)這裡來更改ViewPager裡面的原件或內容,
不要用getArguments().getInt(ARG_SECTION_NUMBER)去判斷目前viewPager當前的頁面E.
FragmentPagerAdapter:
public int getCount() 設定幾個頁面F.menu icon不顯示(google上找到)把MenuBuilder的setOptionalIconsVisible設為true就能顯示icon
values目錄下有styles.xml,string.xml,color.xml,dimens.xml
styles.xml自訂theme
color.xml自訂color對應styles.xml
string.xml自訂的文字
dimens.xml自訂的dimens
icon圖片放在drawable
package com.example.yplin.screenrecorder; //res-value-styles.xml自訂style對應color.xml
//可將icon png複製到res-drawable,只能使用小寫會底線命名
//appbar的layout_behavior必須添加屬性@string/appbar_scrolling_view_behavior,不被攔截
//toolbar的layout_scroollFlags將scrool取消讓toolbar不能滑動
//增加menu item這裡加入選項,res-menu-menu_main.xml
//讓Icon 顯示,把MenuBuilder的setOptionalIconsVisible設為true就能顯示icon
import android.support.annotation.Nullable; import android.support.design.widget.FloatingActionButton; import android.support.design.widget.Snackbar; import android.support.v7.app.AppCompatActivity; import android.support.v7.view.menu.MenuBuilder; import android.support.v7.widget.Toolbar; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import android.support.v4.view.ViewPager; import android.os.Bundle; import android.util.Log; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.widget.Button; import android.widget.RelativeLayout; import android.widget.TextView; import java.lang.reflect.Method; public class MainActivity extends AppCompatActivity { /**
* The {@link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {@link FragmentPagerAdapter} derivative, which will keep every
* loaded fragment in memory. If this becomes too memory intensive, it
* may be best to switch to a
* {@link android.support.v4.app.FragmentStatePagerAdapter}.
*/
private SectionsPagerAdapter mSectionsPagerAdapter; /**
* The {@link ViewPager} that will host the section contents.
*/
private ViewPager mViewPager; private static int mpage=0;//一開始第0頁
private String recorder_text="左右滑動來選擇錄製或截圖"; @Override
protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); final Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); // Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager()); // Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container); mViewPager.setAdapter(mSectionsPagerAdapter);
toolbar.setTitle("全螢幕截圖"); toolbar.setLogo(R.drawable.image_recorder); FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);//add a button
fab.setOnClickListener(new View.OnClickListener() { @Override
public void onClick(View view) { //listener
//由下而上滑動
Snackbar.make(view, recorder_text, Snackbar.LENGTH_LONG) .setAction("Action", null).show(); //這裡放截圖事件 } }); //我們用addOnPageChangeListeneraddOnPageChangeListener來取得當前page
mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() { @Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { Log.d("TAG","position:"+position); switch(position){ case 0: toolbar.setTitle("截屏錄屏服務"); toolbar.setLogo(R.drawable.image_recorder); recorder_text="左右滑動來選擇錄製或截圖"; break; case 1: toolbar.setTitle("全螢幕截屏"); toolbar.setLogo(R.drawable.capture1); recorder_text="開始全螢幕截屏,按左上角開始擷取"; break; case 2: toolbar.setTitle("區域螢幕截屏"); toolbar.setLogo(R.drawable.ic_phone_android); recorder_text="開始區域螢幕截屏,按左上角開始,點擊螢幕擷取"; break; case 3: toolbar.setTitle("全螢幕錄屏"); toolbar.setLogo(R.drawable.camera_photo); recorder_text="開始全螢幕錄屏,按左上角開始錄屏"; break; } } @Override public void onPageScrollStateChanged(int state) { } }); }
//這裡加入選項,res-menu-menu_main.xml
@Override
public boolean onCreateOptionsMenu(Menu menu) { //讓Icon 顯示,把MenuBuilder的setOptionalIconsVisible設為true就能顯示icon
if(menu.getClass().getSimpleName().equals("MenuBuilder")){ try{ Method m=menu.getClass().getDeclaredMethod("setOptionalIconsVisible",Boolean.TYPE); m.setAccessible(true); m.invoke(menu,true); }catch(Exception e){} } /**這也行,但有紅線error但可運行
if(menu instanceof MenuBuilder){
MenuBuilder m=(MenuBuilder) menu;
m.setOptionalIconsVisible(true); }
*/
getMenuInflater().inflate(R.menu.menu_main, menu); return true; } //這裡處理選項事件
@Override
public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId(); Log.d("TAG MENU ID",String.valueOf(id)); Log.d("TAG action ID",String.valueOf(R.id.menu2)); //根據選項切換viewpager
if (id == R.id.menu1) {mViewPager.setCurrentItem(0,true);}//return true;}
if (id == R.id.menu2) {mViewPager.setCurrentItem(2,true);}//return true;}
if (id == R.id.menu3) {mViewPager.setCurrentItem(3,true);}//return true;}
if (id == R.id.menu4) {mViewPager.setCurrentItem(1,true);}//return true;}
return super.onOptionsItemSelected(item); } /**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment { /**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number"; //private static final String ARG_SECTION_NUMBER = "ARG_PAGE";
private RelativeLayout mrelativelayout; //主容器
private TextView mtextView; private View rootView=null; public PlaceholderFragment() { } /**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) { //PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle(); args.putInt(ARG_SECTION_NUMBER, sectionNumber); PlaceholderFragment fragment = new PlaceholderFragment(); fragment.setArguments(args); return fragment; } @Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { if(rootView==null) { rootView = inflater.inflate(R.layout.fragment_main, container, false); } mrelativelayout=(RelativeLayout) rootView.findViewById(R.id.RL); mtextView = (TextView) rootView.findViewById(R.id.textView); //mtextView.setText(getString(R.string.section_format, getArguments().getInt(ARG_SECTION_NUMBER)));
//注意不能用getArguments().getInt(ARG_SECTION_NUMBER)取得當前page取得當前page
//因為這會下到欲轉的頁面一開始會是0,1
//我們用addOnPageChangeListeneraddOnPageChangeListener來取得當前page
//textView.setText(String.valueOf(getArguments().getInt(ARG_SECTION_NUMBER)));
mrelativelayout.removeAllViews();//一開始先清除頁面上所有元件
//根據頁面需要加上元件
if(getArguments().getInt(ARG_SECTION_NUMBER)==1){add_pag1(rootView);} if(getArguments().getInt(ARG_SECTION_NUMBER)==2){add_pag2(rootView);} if(getArguments().getInt(ARG_SECTION_NUMBER)==3){add_pag3(rootView);} if(getArguments().getInt(ARG_SECTION_NUMBER)==4){add_pag4(rootView);} //Log.d("TAG",String.valueOf(getArguments().getString("title")));
//if(getArguments().getInt(ARG_SECTION_NUMBER)==2){add_pag2(rootView);}
return rootView; } //頁面1,新增元件位置時,xml不要相對會變動的元件,否則位置會跑掉
private void add_pag1(View v){ mrelativelayout.removeAllViews(); mrelativelayout.addView(mtextView); mtextView.setText("作者:Y.P.LIN"); Log.d("TAG","screen 4"); } //頁面2,新增元件位置時,xml不要相對會變動的元件,否則位置會跑掉
private void add_pag2(View v){ mrelativelayout.removeAllViews(); mrelativelayout.addView(mtextView); mtextView.setText("全螢幕截圖"); Log.d("TAG","screen 1"); } //頁面3,新增元件位置時,xml不要相對會變動的元件,否則位置會跑掉
private void add_pag3(View v){ mrelativelayout.removeAllViews(); mrelativelayout.addView(mtextView); mtextView.setText("區域螢幕截圖"); Log.d("TAG","screen 2"); } //頁面4,新增元件位置時,xml不要相對會變動的元件,否則位置會跑掉
private void add_pag4(View v){ mrelativelayout.removeAllViews(); mrelativelayout.addView(mtextView); mtextView.setText("全螢幕錄屏"); Log.d("TAG","screen 3"); } }//class PlaceholderFragment /**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages. */
public class SectionsPagerAdapter extends FragmentPagerAdapter { public SectionsPagerAdapter(FragmentManager fm) { super(fm); } @Override
public Fragment getItem(int position) { // getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
return PlaceholderFragment.newInstance(position + 1); } //幾個頁面 @Override public int getCount() { // Show 3 total pages. return 4; } @Override public CharSequence getPageTitle(int position) { switch (position) { case 0: return "SECTION 0"; case 1: return "SECTION 1"; case 2: return "SECTION 2"; case 3: return "SECTION 3"; } return null; } } }
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