public class MyTextView extends TextView {
private int mTextStartIndex;
private int mEverySpaceTime;
private String mTextContent;
private String mSubTextContent;
private boolean mIsStartAnimation;
private ShowTextThread mShowTextThread;
private int mViewVisiblity;
private int mWindowVisiblity;
private volatile boolean mViewVisible;
public MyTextView(Context context, AttributeSet attrs) {
super(context, attrs);
init(attrs);
setTextStyle(context);
mTextContent = (String)getText();
if (mIsStartAnimation) {
mSubTextContent = mTextContent;
}else{
mSubTextContent = mTextContent.substring(0, mTextStartIndex);
}
}
public boolean ismIsStartAnimation() {
return mIsStartAnimation;
}
public void setmIsStartAnimation(boolean mIsStartAnimation) {
this.mIsStartAnimation = mIsStartAnimation;
}
public int getmTextStartIndex() {
return mTextStartIndex;
}
public void setmTextStartIndex(int mTextStartIndex) {
this.mTextStartIndex = mTextStartIndex;
}
public int getmEverySpaceTime() {
return mEverySpaceTime;
}
public void setmEverySpaceTime(int mEverySpaceTime) {
this.mEverySpaceTime = mEverySpaceTime;
}
private void init(AttributeSet attrs) {
TypedArray t = getContext().obtainStyledAttributes(attrs, R.styleable.NewTextViewElement);
mEverySpaceTime = t.getInteger(R.styleable.NewTextViewElement_spaceTime, 300);
mTextStartIndex = t.getInteger(R.styleable.NewTextViewElement_animationStartIndex, 1);
mIsStartAnimation = t.getBoolean(R.styleable.NewTextViewElement_isStartAnimation, false);
t.recycle();
}
@Override
protected void onDraw(Canvas canvas) {
setText(mSubTextContent);
super.onDraw(canvas);
}
class ShowTextThread extends Thread {
public void run() {
changeText();
}
private void changeText() {
final int text_length = getText().length();
if (mTextStartIndex > (text_length - 1)) {
return;
}
int currentIndex = mTextStartIndex;
while (true) {
if (!mViewVisible) {
break;
}
mSubTextContent = mTextContent.substring(0, currentIndex);
postInvalidate();
if (currentIndex == text_length) {
currentIndex = mTextStartIndex;
} else {
currentIndex++;
}
try {
sleep(mEverySpaceTime);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
public void setAnimationTextStartIndex(int index) {
mTextStartIndex = index;
}
private void setTextStyle(Context context) {
AssetManager mgr = context.getAssets();
Typeface createFromAsset = Typeface.createFromAsset(mgr, "yf.ttf");
setTypeface(createFromAsset);
}
@Override
protected void onWindowVisibilityChanged(int visibility) {
super.onWindowVisibilityChanged(visibility);
mWindowVisiblity = visibility;
viewVisiblityChanged();
}
@Override
protected void onVisibilityChanged(View changedView, int visibility) {
super.onVisibilityChanged(changedView, visibility);
mViewVisiblity = visibility;
viewVisiblityChanged();
}
private void viewVisiblityChanged() {
boolean visible = (mViewVisiblity | mWindowVisiblity) == View.VISIBLE;
if (visible == mViewVisible) {
return;
}
mViewVisible = visible;
if (mViewVisible&&mIsStartAnimation) {
// if (mShowTextThread == null) {
// mShowTextThread = new ShowTextThread();
// mShowTextThread.start();
// }
// } else {
// if (mShowTextThread != null) {
// mShowTextThread.interrupt();
// }
new Thread(){
public void run() {
changeText();
}
private void changeText() {
final int text_length = getText().length();
if (mTextStartIndex > (text_length - 1)) {
return;
}
int currentIndex = mTextStartIndex;
while (true) {
if (!mViewVisible) {
break;
}
mSubTextContent = mTextContent.substring(0, currentIndex);
postInvalidate();
if (currentIndex == text_length) {
currentIndex = mTextStartIndex;
} else {
currentIndex++;
}
try {
sleep(mEverySpaceTime);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}.start();
}
}
}
xmlns:xsetting="http://schemas.android.com/apk/res/com.itshow"
//xmlns:xsetting="http://schemas.android.com/apk/res/包名"
<com.itshow.view.MyTextView
android:layout_width="170px"
android:layout_height="wrap_content"
android:text="@string/xxx" 如：123456789
xsetting:animationStartIndex="3"
xsetting:isStartAnimation="true"
xsetting:spaceTime="500" />
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