@Override
protected void onDraw(Canvas canvas) {
String url = "http://dizay.net/files/yuklenenler/4kuAJ0egT90HnVbJz5czHgsPAL3Z4V8TgLsZC37jm8TdsvO9nZeFg1yNgD0jN.png";
Bitmap image, temp, x;
temp = BitmapFactory.decodeResource(getResources(), R.drawable.duvar);
image = Bitmap.createScaledBitmap(temp, canvas.getWidth(), canvas.getHeight(), true);
canvas.drawBitmap(image, 0, 0, null);
x=getBitmapFromURL(url);
// Bitmap over = BitmapFactory.decodeResource(getResources(), getBitmapFromURL(url).describeContents());
image = Bitmap.createScaledBitmap(x, canvas.getWidth(), canvas.getHeight(), true);
canvas.drawBitmap(image, 0, 0, null);
temp = BitmapFactory.decodeResource(getResources(), R.drawable.golge);
image = Bitmap.createScaledBitmap(temp, canvas.getWidth(), canvas.getHeight(), true);
canvas.drawBitmap(image, 0, 0, null);
temp = BitmapFactory.decodeResource(getResources(), R.drawable.supurge);
image = Bitmap.createScaledBitmap(temp, canvas.getWidth(), canvas.getHeight(), true);
canvas.drawBitmap(image, 0, 0, null);
temp = BitmapFactory.decodeResource(getResources(), R.drawable.hali);
image = Bitmap.createScaledBitmap(temp, canvas.getWidth(), canvas.getHeight(), true);
canvas.drawBitmap(image, 0, 0, null);
temp = BitmapFactory.decodeResource(getResources(), R.drawable.tablo);
image = Bitmap.createScaledBitmap(temp, canvas.getWidth(), canvas.getHeight(), true);
canvas.drawBitmap(image, 0, 0, null);
temp = BitmapFactory.decodeResource(getResources(), R.drawable.cicek);
image = Bitmap.createScaledBitmap(temp, canvas.getWidth(), canvas.getHeight(), true);
canvas.drawBitmap(image, 0, 0, null);
temp = BitmapFactory.decodeResource(getResources(), R.drawable.mobilya);
image = Bitmap.createScaledBitmap(temp, canvas.getWidth(), canvas.getHeight(), true);
canvas.drawBitmap(image, 0, 0, null);
temp = BitmapFactory.decodeResource(getResources(), R.drawable.sehpa);
image = Bitmap.createScaledBitmap(temp, canvas.getWidth(), canvas.getHeight(), true);
canvas.drawBitmap(image, 0, 0, null);
super.onDraw(canvas);
}
}
public static Bitmap getBitmapFromURL(String src) {
try {
URL url = new URL(src);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(input);
return myBitmap;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
}
}
错误
09-07 05:10:54.913 1888-1888/com.example.dogushur.canvas E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.dogushur.canvas, PID: 1888
android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1273)
at java.net.InetAddress.lookupHostByName(InetAddress.java:431)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:252)
at java.net.InetAddress.getAllByName(InetAddress.java:215)
at com.android.okhttp.internal.Network$1.resolveInetAddresses(Network.java:29)
at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:188)
at com.android.okhttp.internal.http.RouteSelector.nextProxy(RouteSelector.java:157)
at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:100)
at com.android.okhttp.internal.http.HttpEngine.createNextConnection(HttpEngine.java:357)
at com.android.okhttp.internal.http.HttpEngine.nextConnection(HttpEngine.java:340)
at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:330)
at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:248)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:433)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:114)
at com.example.dogushur.canvas.MainActivity.getBitmapFromURL(MainActivity.java:106)
at com.example.dogushur.canvas.MainActivity$Ciz.onDraw(MainActivity.java:60)
at android.view.View.draw(View.java:16178)
at android.view.View.updateDisplayListIfDirty(View.java:15174)
at android.view.View.draw(View.java:15948)
at android.view.ViewGroup.drawChild(ViewGroup.java:3609)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3399)
at android.view.View.updateDisplayListIfDirty(View.java:15169)
at android.view.View.draw(View.java:15948)
at android.view.ViewGroup.drawChild(ViewGroup.java:3609)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3399)
at android.view.View.updateDisplayListIfDirty(View.java:15169)
at android.view.View.draw(View.java:15948)
at android.view.ViewGroup.drawChild(ViewGroup.java:3609)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3399)
at android.view.View.updateDisplayListIfDirty(View.java:15169)
at android.view.View.draw(View.java:15948)
at android.view.ViewGroup.drawChild(ViewGroup.java:3609)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3399)
at android.view.View.updateDisplayListIfDirty(View.java:15169)
at android.view.View.draw(View.java:15948)
at android.view.ViewGroup.drawChild(ViewGroup.java:3609)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3399)
at android.view.View.updateDisplayListIfDirty(View.java:15169)
at android.view.View.draw(View.java:15948)
at android.view.ViewGroup.drawChild(ViewGroup.java:3609)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3399)
at android.view.View.updateDisplayListIfDirty(View.java:15169)
at android.view.View.draw(View.java:15948)
at android.view.ViewGroup.drawChild(ViewGroup.java:3609)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3399)
at android.view.View.draw(View.java:16181)
at com.android.internal.policy.PhoneWindow$DecorView.draw(PhoneWindow.java:2690)
at android.view.View.updateDisplayListIfDirty(View.java:15174)
at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:281)
at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:287)
at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:322)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2615)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2434)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2067)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
at android.view.Choreographer.doCallbacks(Choreographer.java:670)
at android.view.Choreographer.doFrame(Choreographer.java:606)
at android.view.Choreographer$FrameDis
09-07 05:15:55.288 1888-1888/com.example.dogushur.canvas I/Process: Sending signal. PID: 1888 SIG: 9
答案 0 :(得分：0)
你不能在主线程中做网络的东西。您必须创建异步操作：
class Check extends AsyncTask<String, Integer, Bitmap b> {
@Override
protected Bitmap doInBackground(String... src) {
URL url = new URL(src);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(input);
setBitmap(myBitmap);//for access in main class
return myBitmap;
//do connections
}
}
并致电代码：
new Check().execute("https://example.com");
您可以禁用StrictMode，但这是一个非常糟糕的主意。首先启用它是有原因的。
如果 您决定禁用StrictMode，请执行以下操作：
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
尽管如此，这样做会导致类似这样的事情：Android freeze screen 20 seconds after execute a HTTP Post