目录 搜索
android Manifest Manifest.permission Manifest.permission_group android.accessibilityservice AccessibilityService android.accounts Account android.app NotificationManager android.bluetooth BluetoothAdapter BluetoothClass BluetoothClass.Device BluetoothClass.Device.Major BluetoothClass.Service BluetoothDevice BluetoothServerSocket BluetoothSocket android.content SharedPreferences android.database.sqlite SQLiteCursorDriver SQLiteOpenHelper android.graphics Bitmap android.location LocationListener Geocoder GpsStatus GpsStatus.Listener GpsStatus.NmeaListener GpsSatellite android.media AudioFormat AsyncPlayer AudioRecord AudioRecord.OnRecordPositionUpdateListener ThumbnailUtils AudioManager android.net TrafficStats MailTo LocalSocket android.os AsyncTask AsyncTask.Status CountDownTimer Message MessageQueue HandlerThread android.text Html android.util JsonWriter android.view ContextMenu ContextMenu.ContextMenuInfo Display ViewManager View ViewStub ViewTreeObserver ViewParent WindowManager GestureDetector Gravity MenuInflater ScaleGestureDetector SoundEffectConstants android.view.inputmethod InputConnection InputMethod InputMethodSession BaseInputConnection InputMethodManager android.widget AbsListView AbsListView.LayoutParams AbsListView.OnScrollListener AbsListView.RecyclerListener AbsoluteLayout AbsoluteLayout.LayoutParams AbsSeekBar AbsSpinner AdapterView AdapterView.AdapterContextMenuInfo AdapterView.OnItemLongClickListener AdapterView.OnItemSelectedListener AdapterView.OnItemClickListener AnalogClock BaseAdapter BaseExpandableListAdapter Button CheckBox CheckedTextView Checkable Chronometer Chronometer.OnChronometerTickListener CompoundButton CompoundButton.OnCheckedChangeListener CursorAdapter CursorTreeAdapter DatePicker DatePicker.OnDateChangedListener DialerFilter DigitalClock EditText Filter Filter.FilterListener Filter.FilterResults ExpandableListAdapter ExpandableListView.OnChildClickListener ExpandableListView.OnGroupClickListener ExpandableListView.OnGroupCollapseListener ExpandableListView.OnGroupExpandListener Filterable Gallery Gallery.LayoutParams GridView GridLayout GridLayout.Alignment RadioGroup ImageView ImageView.ScaleType HorizontalScrollView ImageButton ImageSwitcher FilterQueryProvider ListAdapter ListView MediaController MultiAutoCompleteTextView MultiAutoCompleteTextView.CommaTokenizer MultiAutoCompleteTextView.Tokenizer QuickContactBadge RadioButton RatingBar RatingBar.OnRatingBarChangeListener RelativeLayout RemoteViews ResourceCursorAdapter ResourceCursorTreeAdapter Scroller ScrollView SearchView SearchView.OnCloseListener SearchView.OnQueryTextListener SearchView.OnSuggestionListener SeekBar SeekBar.OnSeekBarChangeListener SimpleAdapter SimpleAdapter.ViewBinder SimpleCursorAdapter SimpleCursorAdapter.CursorToStringConverter SimpleCursorAdapter.ViewBinder SimpleCursorTreeAdapter SimpleCursorTreeAdapter.ViewBinder SimpleExpandableListAdapter SlidingDrawer SlidingDrawer.OnDrawerCloseListener SlidingDrawer.OnDrawerOpenListener SlidingDrawer.OnDrawerScrollListener Spinner SpinnerAdapter WrapperListAdapter TabHost TabHost.TabSpec TextView TimePicker TimePicker.OnTimeChangedListener Toast TableLayout TableLayout.LayoutParams TableRow TableRow.LayoutParams TabWidget TextSwitcher ToggleButton TwoLineListItem VideoView ViewAnimator ViewFlipper ViewSwitcher ViewSwitcher.ViewFactory ZoomButtonsController ZoomButtonsController.OnZoomListener ZoomButton ZoomControls dalvik.system DexFile
文字


TextSwitcher

版本:Android 2.2 r1

 

public class TextSwitcher extends ViewSwitcher

 

java.lang.Object

         android.view.View

                android.view.ViewGroup

                            android.widget.FrameLayout

                                     android.widget.ViewAnimator

                                          android.widget.ViewSwitcher

                                                 android.widget.TextSwitcher

 

概述

        

         ViewSwitcher仅仅包含子类型TextViewTextSwitcher被用来使屏幕上的label产生动画效果。每当setText(CharSequence)被调用时,TextSwitcher使用动画方式将当前的文字内容消失并显示新的文字内容。

 

构造函数

         public TextSwitcher (Context context)

         创建一个新的空TextSwitcher

                   参数

context  应用程序上下文

 

         public TextSwitcher (Context context, AttributeSet attrs)

         使用提供的contextattributes来创建一个空的TextSwitcher

                   参数

                            context  应用程序环境

                            attrs                   属性集合

 

公共方法       

         public void addView (View child, int index, ViewGroup.LayoutParams params)

         根据指定的布局参数新增一个子视图

                   参数

                            child          新增的子视图

                            index         新增子视图的位置

                            params    新增子视图的布局参数

         抛出异常

                   IllegalArgumentException       当子视图不是一个TextView实例时

 

         public void setCurrentText (CharSequence text)

         设置当前显示的文本视图的文字内容。非动画方式显示。

                   参数

                            text           需要显示的新文本内容

 

         public void setText (CharSequence text)

         设置下一视图的文本内容并切换到下一视图。可以动画的退出当前文本内容,显示下一文本内容。

                   参数

                            text           需要显示的新文本内容

 

示例

         摘自APIDemos->View->TextSwitcher

Java:

public class TextSwitcher1 extends Activity implements ViewSwitcher.ViewFactory,

        View.OnClickListener {

 

    private TextSwitcher mSwitcher;

    private int mCounter = 0;

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

 

        setContentView(R.layout.text_switcher_1);

 

        mSwitcher = (TextSwitcher) findViewById(R.id.switcher);

        mSwitcher.setFactory(this);

 

        Animation in = AnimationUtils.loadAnimation(this,

                android.R.anim.fade_in);

        Animation out = AnimationUtils.loadAnimation(this,

                android.R.anim.fade_out);

        mSwitcher.setInAnimation(in);

        mSwitcher.setOutAnimation(out);

 

        Button nextButton = (Button) findViewById(R.id.next);

        nextButton.setOnClickListener(this);

 

        updateCounter();

    }

 

    public void onClick(View v) {

        mCounter++;

        updateCounter();

    }

 

    private void updateCounter() {

        mSwitcher.setText(String.valueOf(mCounter));

    }

 

    public View makeView() {

        TextView t = new TextView(this);

        t.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL);

        t.setTextSize(36);

        return t;

    }

}

 

Xml:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical">

    <Button android:id="@+id/next"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/text_switcher_1_next_text" />

    <TextSwitcher android:id="@+id/switcher"

        android:layout_width="match_parent"

        android:layout_height="wrap_content" />

</LinearLayout>


上一篇: 下一篇: