你好 stackoverflow，我正在尝试开发一个可以播放我的自己的 GIF 的安卓应用程序，以下是代码片段：
MainActivity.java
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}
AnimationView.java
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Movie;
import android.util.AttributeSet;
import android.view.View;
public class AnimationView extends View {
private Movie mMovie;
private long mMovieStart;
private static final boolean DECODE_STREAM = true;
private int mDrawLeftPos;
private int mHeight, mWidth;
private static byte[] streamToBytes(InputStream is) {
ByteArrayOutputStream os = new ByteArrayOutputStream(1024);
byte[] buffer = new byte[1024];
int len;
try {
while ((len = is.read(buffer)) >= 0) {
os.write(buffer, 0, len);
}
} catch (java.io.IOException e) {
}
return os.toByteArray();
}
public AnimationView(Context context, AttributeSet attrs) {
super(context, attrs);
setFocusable(true);
java.io.InputStream is;
is = context.getResources().openRawResource(R.drawable.scanning);
if (DECODE_STREAM) {
mMovie = Movie.decodeStream(is);
} else {
byte[] array = streamToBytes(is);
mMovie = Movie.decodeByteArray(array, 0, array.length);
}
}
@Override
protected void onMeasure( int widthMeasureSpec, int heightMeasureSpec )
{
int p_top = this.getPaddingTop(), p_bottom = this.getPaddingBottom();
mWidth = mMovie.width();
mHeight = mMovie.height();
// Calculate new desired height
final int desiredHSpec = MeasureSpec.makeMeasureSpec( mHeight + p_top + p_bottom , MeasureSpec.EXACTLY );
setMeasuredDimension( widthMeasureSpec, desiredHSpec );
super.onMeasure( widthMeasureSpec, desiredHSpec );
// Update the draw left position
mDrawLeftPos = Math.max( ( this.getWidth() - mWidth ) / 2, 0) ;
}
@Override
public void onDraw(Canvas canvas) {
long now = android.os.SystemClock.uptimeMillis();
if (mMovieStart == 0) { // first time
mMovieStart = now;
}
if (mMovie != null) {
int dur = mMovie.duration();
if (dur == 0) {
dur = 3000;
}
int relTime = (int) ((now - mMovieStart) % dur);
// Log.d("", "real time :: " +relTime);
mMovie.setTime(relTime);
mMovie.draw(canvas, mDrawLeftPos, this.getPaddingTop());
invalidate();
}
}
}
main.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:background="#FFFFFF"
android:orientation="vertical" >
<com.example.androidgifwork.AnimationView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
</LinearLayout>
Manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.androidgifwork"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name="com.example.androidgifwork.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
当我运行上述代码片段时，GIF 并没有运行，但是当我删除 android:targetSdkVersion="19" 后，GIF 就可以运行了，请帮助我解决这个谜题。
谢谢
4.4或API 18及以上版本中存在GIF问题，但如果你真的想播放GIF，是可以实现的。我不能在这里发布播放任何版本Android中GIF的完整源代码，请发送私信。谢谢。 - Chethan Shetty