blocks|key|2032816|text|它应该是这样的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2032817|@Override
protected+void+dispatchDraw(Canvas+canvas)+{
++++canvas.save(Canvas.MATRIX_SAVE_FLAG);
++++if+(compass)+{
++++++++//+rotate+the+canvas+with+the+pivot+on+the+center+of+the+screen
++++++++canvas.rotate(-azimuth,+getWidth()+*+0.5f,+getHeight()+*+0.5f);
++++++++super.dispatchDraw(canvas);
++++++++canvas.restore();
++++}
}|code-block|syntax|javascript|2032818|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

It should be something like this:

<pre><code>@Override
protected void dispatchDraw(Canvas canvas) {
 canvas.save(Canvas.MATRIX_SAVE_FLAG);
 if (compass) {
 // rotate the canvas with the pivot on the center of the screen
 canvas.rotate(-azimuth, getWidth() * 0.5f, getHeight() * 0.5f);
 super.dispatchDraw(canvas);
 canvas.restore();
 }
}
</code></pre>

blocks|key|2032824|text|看看ANDROID_SDK\add-ons\addon-google_apis-google_inc_-7\samples\MapsDemo中的MapsDemo示例。它有旋转贴图演示。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2032825|entityMap^0|2|1W|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Take a look at MapsDemo examples in <code>ANDROID_SDK\add-ons\addon-google_apis-google_inc_-7\samples\MapsDemo</code>. It has rotation map demo.

blocks|key|2032839|text|此答案适用于Google+Maps+api+v2。可以通过向传感器侦听器注册您的应用程序来定位，并在onSensorChanged内获得相对于真北的角度，并相应地更新相机。角度可以用于轴承。可以使用以下代码：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2032840|尝试使用getOrinetation+Sensor.TYPE_ORIENTATION，而不是使用api。Sensor.TYPE_ORIENTATION已被弃用。|2032841|@Override
protected+void+onResume()+{
++++//+TODO+Auto-generated+method+stub
++++super.onResume();
++++if+(sensorManager+!=+null)
++++++++sensorManager.registerListener(this,
++++++++++++++++sensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION),
++++++++++++++++SensorManager.SENSOR_DELAY_GAME);
}

public+void+onSensorChanged(SensorEvent+event)+{

++++float+degree+=+Math.round(event.values[0]);

++++Log.d(TAG,+"Degree+----------+"+%2B+degree);

++++updateCamera(degree);

}

private+void+updateCamera(float+bearing)+{
++++CameraPosition+oldPos+=+googleMap.getCameraPosition();

++++CameraPosition+pos+=+CameraPosition.builder(oldPos).bearing(bearing)
++++++++++++.build();

++++googleMap.moveCamera(CameraUpdateFactory.newCameraPosition(pos));

}|code-block|syntax|javascript|2032842|entityMap^0|6|I|1E|F|0|J|N|1G|N|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@$9|U|A|V|B|C]|$9|W|A|X|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|Y|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|N|$]]

This answer applies to <code>Google Maps api v2</code>.
It is possible by registering your application with Sensor Listener for Orientation and get the
angle relative to true north inside <code>onSensorChanged</code> and update camera accordingly.
Angle can be used for bearing. Following code can be used:
Instead of using <code>Sensor.TYPE_ORIENTATION</code> try using getOrinetation api. <code>Sensor.TYPE_ORIENTATION</code>
has been deprecated.
<pre><code>@Override
protected void onResume() {
 // TODO Auto-generated method stub
 super.onResume();
 if (sensorManager != null)
 sensorManager.registerListener(this,
 sensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION),
 SensorManager.SENSOR_DELAY_GAME);
}

public void onSensorChanged(SensorEvent event) {

 float degree = Math.round(event.values[0]);

 Log.d(TAG, &quot;Degree ---------- &quot; + degree);

 updateCamera(degree);

}

private void updateCamera(float bearing) {
 CameraPosition oldPos = googleMap.getCameraPosition();

 CameraPosition pos = CameraPosition.builder(oldPos).bearing(bearing)
 .build();

 googleMap.moveCamera(CameraUpdateFactory.newCameraPosition(pos));

}
</code></pre>

I am writing an Android app where one of the features is that the map will rotate according to the compass (i.e. if the phone is pointing east, the map will be oriented so that the east side of the map is on top). Previous answers that I have found suggested over writing the onDraw() method in mapView, however, the api changed the method to final so it cannot be overwritten. As a result I have tried to overwrite the <code>dispatchDraw()</code> method like so:

Note:

-compass is a boolean that if true, rotate the view

-bearing is a float variable that has the degrees that the view should rotate

<pre><code>protected void dispatchDraw(Canvas canvas) {
 canvas.save();
 if (compass) {
 final float w = this.getWidth();
 final float h = this.getHeight();

 final float scaleFactor = (float)(Math.sqrt(h * h + w * w) / Math.min(w, h));

 final float centerX = w / 2.0f;
 final float centerY = h / 2.0f;

 canvas.rotate(bearing, centerX, centerY);
 canvas.scale(scaleFactor, scaleFactor, centerX, centerY);

 }
 super.dispatchDraw(canvas);
 canvas.restore();
}
</code></pre>

Rotate MapView in Android

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在写一个Android应用程序，其中一个功能是地图将根据指南针旋转(即，如果手机指向东方，地图将被定向，以便地图的东侧在顶部)。我之前发现的答案建议在mapView中编写onDraw()方法，但是，api将该方法更改为final，因此它不能被覆盖。因此，我尝试覆盖dispatchDraw()方法，如下所示：注意：-...

问在安卓中旋转MapView
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