I have followed this tutorial ( http://stuffthathappens.com/blog/2008/11/13/android-animation-101/ ) and have a beautiful rotating text being drawn onto a canvas. Everything works perfectly when my main activity uses
setContentView(new SplashScreenAnimation(this));
Here is SplashScreenAnimation:
public class SplashScreenAnimation extends View {
private static final String QUOTE = "Nobody uses Java anymore. It's this big heavyweight ball and chain.";
private Animation anim;
public SplashScreenAnimation(Context context) {
super(context);
}
private void createAnim(Canvas canvas) {
anim = new RotateAnimation(0, 360, canvas.getWidth() / 2, canvas
.getHeight() / 2);
anim.setRepeatMode(Animation.REVERSE);
anim.setRepeatCount(Animation.INFINITE);
anim.setDuration(10000L);
anim.setInterpolator(new AccelerateDecelerateInterpolator());
startAnimation(anim);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
// Creates the animation the first time
if (anim == null) {
createAnim(canvas);
}
Path circle = new Path();
int centerX = canvas.getWidth() / 2;
int centerY = canvas.getHeight() / 2;
int r = Math.min(centerX, centerY);
circle.addCircle(centerX, centerY, r, Direction.CW);
Paint paint = new Paint();
paint.setColor(Color.BLUE);
paint.setTextSize(30);
paint.setAntiAlias(true);
canvas.drawTextOnPath(QUOTE, circle, 0, 30, paint);
}
}
However I want to combine this animated text and have two buttons underneath it so I have a RelativeLayout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:id="@+id/RelativeLayout1"
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:background="@drawable/splash_screen">
<LinearLayout android:orientation="vertical"
android:layout_height="wrap_content" android:layout_width="fill_parent"
android:layout_alignParentBottom="true" android:id="@+id/bottomLinearLayout">
<Button android:layout_gravity="center_horizontal" android:id="@+id/playButton"
android:text="Button" android:layout_height="wrap_content"
android:layout_width="wrap_content"></Button>
<Button android:layout_height="wrap_content"
android:layout_width="wrap_content" android:id="@+id/optionsButton"
android:text="Button" android:layout_gravity="center_horizontal"
android:layout_marginBottom="30sp"></Button>
</LinearLayout>
<LinearLayout android:id="@+id/topLinearLayout"
android:orientation="vertical" android:layout_height="wrap_content"
android:layout_alignParentTop="true" android:layout_width="fill_parent">
</LinearLayout>
</RelativeLayout>
How can I add this custom view to the LinearLayout above? (topLinearLayout - it's the last one)
I've tried a lot of different things, and I keep ending up with force closes.
This sort of approach has been mainly what I've tried. I've tried inflating it, etc.
LinearLayout item = (LinearLayout)findViewById(R.id.topLinearLayout);
SplashScreenAnimation child = new SplashScreenAnimation(this);
item.addView(child);
I added entire SplashScreenAnimation class code:
((LinearLayout) findViewById(R.id.topLinearLayout)).addView(new SplashScreenAnimation(this))
It works!!
Why won't the other methods of adding it manually work? Has it something to do with the fact the animation needs to start via onDraw
?
You should be able to include it just like any other view in your layout.
Try the following and then set your content view to the entire XML layout:
<LinearLayout android:id="@+id/topLinearLayout"
android:orientation="vertical" android:layout_height="wrap_content"
android:layout_alignParentTop="true" android:layout_width="fill_parent">
<com.YOURPACKAGENAME.SplashScreenAnimation
android:id="@+id/animation"
android:layout_height="wrap_content"
android:layout_width="wrap_content"/>
</LinearLayout>
It's pretty easy, and you just need to include the full package name of the class extending the View class:
<LinearLayout
android:id="@+id/topLinearLayout"
android:orientation="vertical"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_width="fill_parent">
<mypackage.SplashScreenAnimation
android:layout_height="wrap_content"
android:layout_width="fill_parent"/>
</LinearLayout>
尝试以下行添加视图:
((LinearLayout) findViewById(R.id.topLinearLayout)).addView(new SplashScreenAnimation(this))
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