我正在尝试使用Picasso库下载图像,然后将图像保存到本地存储中。
错误:在
下面是我编写的下载和保存图像的代码片段:
getImage()
方法的日志“inside getImage”之后,logcat显示了来自onBitmapFailed(Drawable errorDrawable)
的日志。
我只能找到将目标引用转换为强引用的示例。 然而,这并不能解决问题。下面是我编写的下载和保存图像的代码片段:
import android.content.Context;
import android.content.ContextWrapper;
import android.graphics.Bitmap;
import android.graphics.drawable.Drawable;
import android.os.Environment;
import android.util.Log;
import com.squareup.picasso.Picasso;
import com.squareup.picasso.Target;
import java.io.File;
import java.io.FileOutputStream;
public class DownloadImage {
Context mContext;
Target target;
public void getImage(Context context) {
mContext = context;
String path = "/data/data/ops.com.imagefetcher/images";
Picasso.with(context)
.load("http://blog.concretesolutions.com.br/wp-content/uploads/2015/04/Android1.png")
.into(getTarget(path));
Log.e("Download Image: ", "inside getImage()");
}
private Target getTarget(final String path) {
// ContextWrapper cw = new ContextWrapper(mContext);
// final File directory = cw.getDir(path, Context.MODE_PRIVATE); // path to /data/data/yourapp/app_imageDir
target = new Target() {
@Override
public void onBitmapLoaded(final Bitmap bitmap, Picasso.LoadedFrom from) {
new Thread(new Runnable() {
@Override
public void run() {
Log.e("Download Image: ", "inside run");
final File myImageFile = new File(Environment.getExternalStorageDirectory().getPath() + "/" + path, "example");
FileOutputStream ostream = null;
try {
Log.e("Download Image: ", "inside try");
myImageFile.createNewFile();
ostream = new FileOutputStream(myImageFile);
bitmap.compress(Bitmap.CompressFormat.JPEG, 80, ostream);
ostream.flush();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
ostream.close();
Log.e("Download Image: ", "inside finally");
} catch (Exception e) {
e.printStackTrace();
}
}
Log.e("Download Image: ", "image saved to >>>" + myImageFile.getAbsolutePath());
}
}).start();
}
@Override
public void onBitmapFailed(Drawable errorDrawable) {
Log.e("Download Image: ", "error!");
}
@Override
public void onPrepareLoad(Drawable placeHolderDrawable) {
}
};
return target;
}
}
清单文件是:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="ops.com.imagefetcher">
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".MyService"
android:enabled="true"
android:exported="true"/>
</application>
</manifest>
日志输出:这是我在日志中所获得的,除此之外没有其他信息。
01-09 19:56:26.964 30021-30021/ops.com.imagefetcher E/Download Image:: before target
01-09 19:56:26.964 30021-30021/ops.com.imagefetcher E/Download Image:: inside getImage()
01-09 19:56:26.964 30021-30021/ops.com.imagefetcher E/MyService:: below getImage()
01-09 19:56:27.884 30021-30111/ops.com.imagefetcher D/dalvikvm: GC_FOR_ALLOC freed 314K, 12% free 3109K/3500K, paused 2ms, total 2ms