當我們使用TAB切換畫面時，Fragment是其中的一種方法。
首先建立畫面的XML檔案，檔案名tab1.xml。如下：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
tools:ignore="ExtraText">
<androidx.appcompat.widget.Toolbar
android:id="@+id/toolbar2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:minHeight="?attr/actionBarSize"
android:theme="@style/AppTheme"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:popupTheme="@style/ToolBarPopTheme"
app:titleTextAppearance="@style/ToolbarTitle" />
<SearchView
android:id="@+id/search_view1"
android:layout_width="0dp"
android:layout_height="50dp"
android:background="@color/searchView"
android:queryBackground="@null"
android:queryHint="請輸入查詢名稱！"
app:layout_constraintEnd_toStartOf="@+id/ll1"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/toolbar2"
tools:ignore="MissingConstraints" />
<LinearLayout
android:id="@+id/ll1"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:background="@color/color_text_style1"
android:orientation="horizontal"
app:layout_constraintBottom_toBottomOf="@+id/search_view1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/search_view1"
app:layout_constraintTop_toTopOf="@+id/search_view1"
tools:ignore="MissingConstraints">
<TextView
android:id="@+id/dx_show"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="5dp"
android:gravity="center"
android:text="全部"
android:textColor="@color/colordl"
android:textSize="16sp" />
<TextView
android:id="@+id/reg_count"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_gravity="center"
android:layout_margin="5dp"
android:background="@drawable/text_style1"
android:gravity="center"
android:textColor="@color/colordl" />
</LinearLayout>
<TextView
android:id="@+id/textView"
android:layout_width="0dp"
android:layout_height="50dp"
android:textSize="25sp"
android:background="@drawable/text_frame"
app:layout_constraintHorizontal_weight="1"
android:gravity="center"
android:text="位址"
app:layout_constraintEnd_toStartOf="@+id/textView2"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/search_view1"
tools:ignore="MissingConstraints,UnknownId"
tools:layout_editor_absoluteY="106dp" />
<TextView
android:id="@+id/textView2"
android:layout_width="0dp"
android:layout_height="50dp"
android:gravity="center"
android:text="值"
android:textSize="25sp"
android:background="@drawable/text_frame"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_weight="1"
app:layout_constraintStart_toEndOf="@+id/textView"
app:layout_constraintTop_toBottomOf="@+id/search_view1"
tools:ignore="MissingConstraints" />
<ListView
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintTop_toBottomOf="@+id/textView2"
tools:ignore="MissingConstraints"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
實作畫面如下：
建立對應的fragmnet代碼，如下：
public class tab1 extends Fragment {
private SearchView searchView;
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.tab1,container,false);
androidx.appcompat.widget.Toolbar toolbar =(Toolbar)view.findViewById(R.id.toolbar2);
toolbar.setTitle("裝置");
((AppCompatActivity) getActivity()).setSupportActionBar(toolbar);
setHasOptionsMenu(true);
//Objects.requireNonNull(getSupportActionBar()).setDisplayShowTitleEnabled(false);//隐藏預設的Title
// 以下動作讓标題居中顯地
TextView textView = (TextView) toolbar.getChildAt(0);//主标題
textView.getLayoutParams().width = LinearLayout.LayoutParams.MATCH_PARENT;//填充父類
textView.setGravity(Gravity.CENTER);
searchView = (SearchView) view.findViewById(R.id.search_view1);
searchView.setIconifiedByDefault(false);
searchView.setSubmitButtonEnabled(true);//增加送出按鈕
// TextView textView1=searchView.findViewById(android.support.
int id = searchView.getContext().getResources().getIdentifier("android:id/search_src_text",null,null);
//擷取到searchview TextView的控件
TextView textView1 = (TextView) searchView.findViewById(id);
//設定字型大小為14sp
textView1.setTextSize(TypedValue.COMPLEX_UNIT_SP, 18);//14sp
toolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_exit:
ActivityCollector.killAllActivity();
break;
case R.id.action_test:
//Intent intent=new Intent(Main4Activity.this,Main3Activity.class);
//startActivity(intent);
//overridePendingTransition(R.anim.in_from_right, R.anim.out_to_left);
}
return true;
}
});
return view;
}
}
其中
通過ID查找到布局檔案
通過布局檔案找到Toolbar
設定Toolbar标題
以下兩行代碼一次要添加，并且要在toolbar.setTitle(“裝置”)之後添加，如果寫在前面标題名就變成Activity的了。
((AppCompatActivity) getActivity()).setSupportActionBar(toolbar);
setHasOptionsMenu(true);
标題居中設定
TextView textView = (TextView) toolbar.getChildAt(0);//主标題
textView.getLayoutParams().width = LinearLayout.LayoutParams.MATCH_PARENT;//填充父類
textView.setGravity(Gravity.CENTER);
在往下的代碼是設定SearchView控件和設定事件監聽，就不詳細說明了。可自行百度，因為我也是百度出來的。
主代碼：添加tab,自定義樣式
//采用自定義樣式設定标簽
/*添加tab*/
for (int i = 0; i < 3; i++) {
View view = LayoutInflater.from(this).inflate(R.layout.tabview, null, false);
TextView tabviewtextView = (TextView) view.findViewById(R.id.tabveiw_text);
ImageView imageView = (ImageView) view.findViewById(R.id.tabview_icon);
TextView tabviewtextView1=(TextView)view.findViewById(R.id.icontext);
Intent intent=new Intent(Main3Activity.this,Main4Activity.class);
//tabHost.setup(this.getLocalActivityManager());
switch (i) {
case 0:
tabviewtextView.setText("寄存器");
tabviewtextView1.setVisibility(View.GONE);
imageView.setImageResource(R.drawable.reg1);
tabHost.addTab(tabHost.newTabSpec("tab1").setIndicator(view).setContent(R.id.tab1));
break;
case 1:
tabviewtextView.setText("報表");
tabviewtextView1.setVisibility(View.GONE);
imageView.setImageResource(R.drawable.report1);
tabHost.addTab(tabHost.newTabSpec("tab2").setIndicator(view).setContent(R.id.tab2));
break;
case 2:
tabviewtextView.setText("報警");
imageView.setImageResource(R.drawable.alarm1);
tabHost.addTab(tabHost.newTabSpec("tab3").setIndicator(view).setContent(R.id.tab3));
break;
}
}
通過tab的切換切換Fragment
FragmentManager fragmentManager=getSupportFragmentManager();
FragmentTransaction fragmentTransaction=fragmentManager.beginTransaction();
switch (tabId){
case "tab1":
((ImageView)tabHost.getCurrentTabView().findViewById(R.id.tabview_icon)).setImageResource(R.drawable.reg);
tab1 tab1fragment = new tab1();
fragmentTransaction.replace(R.id.fram,tab1fragment,"tag1");
fragmentTransaction.commit();
break;
case "tab2":
((ImageView)tabHost.getCurrentTabView().findViewById(R.id.tabview_icon)).setImageResource(R.drawable.report);
tab2 tab2fragment = new tab2();
fragmentTransaction.replace(R.id.fram,tab2fragment,"tag2");
fragmentTransaction.commit();
break;
case "tab3":
((ImageView)tabHost.getCurrentTabView().findViewById(R.id.tabview_icon)).setImageResource(R.drawable.alarm);
tab3 tab3fragment = new tab3();
fragmentTransaction.replace(R.id.fram,tab3fragment,"tag3");
fragmentTransaction.commit();
break;
}
}
});
.這篇文章主要是用來記錄學習過程中的一些知識點，友善以後查找學習。
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