我正在我的 Android 应用程序中实现自定义的逐向导航。为实现这一点，我使用 Intent.ACTION_VIEW 作为 Action 并使用“google.navigation:q”作为 uri 字符串从我的 MainActivity 开始 Activity 。谷歌地图导航页面已成功加载到我的应用程序中。

但是，我不知道如何优雅地退出这个页面。如果我使用后退按钮按下，则需要点击 4 次后退按钮才能显示我的主 Activity 屏幕。是否有可能在此页面中放置“退出”按钮。

我已经尝试使用“onActivityForResult”和“onBackPressed”来破坏谷歌地图屏幕。这些都不起作用。请提供一些进一步的建议。

最佳答案

我知道我回答这个问题已经很晚了，但也许它可以帮助别人。

您无法通过单次返回从谷歌地图返回到您的 Activity/应用程序，为此您需要创建一个 float View /小部件，如 ola/uber，它将在正确实现后为您完成此操作。这是我的实现。

首先，用户将从 YourActivity 转到 map 应用。在此 Activity 中，我们将在单击某个 View 时请求 SYSTEM_ALERT_WINDOW 的权限(DRAW OVER，对于 SDK > MarshMallow)。然后我们将启动谷歌地图以及我们创建的服务来创建一个 float 图标。

class YourActivity extends AppCompatActivity{

private GetFloatingIconClick mGetServiceClick;
public static boolean isFloatingIconServiceAlive = false;

onCreate(){
    mGetServiceClick = new GetFloatingIconClick();

    somebtn.onclick(){
        askDrawOverPermission();
    }
}

private class GetFloatingIconClick extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Intent selfIntent = new Intent(YourActivity.this, YourActivity.class);
        selfIntent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT | Intent.FLAG_ACTIVITY_SINGLE_TOP
                | Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(selfIntent);
    }
}

private void askDrawOverPermission() {
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
        // if OS is pre-marshmallow then create the floating icon, no permission is needed
        createFloatingBackButton();
    } else {
        if (!Settings.canDrawOverlays(this)) {
            // asking for DRAW_OVER permission in settings
            Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
                    Uri.parse("package:" + getApplicationContext().getPackageName()));
            startActivityForResult(intent, REQ_CODE_DRAW_OVER);
        } else {
            createFloatingBackButton();
        }
    }
}

// starting service for creating a floating icon over map
private void createFloatingBackButton() {
    Intent iconServiceIntent = new Intent(YourActivity.this, FloatingOverMapIconService.class);
    iconServiceIntent.putExtra("RIDE_ID", str_rideId);

    Intent navigation = new Intent(Intent.ACTION_VIEW, Uri
            .parse("google.navigation:q=" + lat_DEST + "," + lng_DEST + "&mode=d"));
    navigation.setPackage("com.google.android.apps.maps");
    startActivityForResult(navigation, 1234);

    startService(iconServiceIntent);
}

@TargetApi(Build.VERSION_CODES.M)
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQ_CODE_DRAW_OVER) {
        // as permissions from Settings don't provide any callbacks, hence checking again for the permission
        // so that we can draw our floating without asking user to click on the previously clicked view
        // again
        if (Settings.canDrawOverlays(this)) {
            createFloatingBackButton();
        } else {
            //permission is not provided by user, do your task
            //GlobalVariables.alert(mContext, "This permission is necessary for this application's functioning");
        }
    } else if (requestCode == 1234) {
        // no result is returned by google map, as google don't provide any apis or documentation
        // for it.
    } else {
        super.onActivityResult(requestCode, resultCode, data);
    }
}
}

服务等级:-

public class FloatingOverMapIconService extends Service {
private WindowManager windowManager;
private FrameLayout frameLayout;
private String str_ride_id;
public static final String BROADCAST_ACTION = "com.yourpackage.YourActivity";

@Nullable
@Override
public IBinder onBind(Intent intent) {
    return null;
}

@Override
public void onCreate() {
    super.onCreate();
    createFloatingBackButton();
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    // to receive any data from activity
    str_ride_id = intent.getStringExtra("RIDE_ID");
    return START_STICKY;
}

@Override
public void onDestroy() {
    super.onDestroy();
    windowManager.removeView(frameLayout);
}

private void createFloatingBackButton() {

    CurrentJobDetail.isFloatingIconServiceAlive = true;

    WindowManager.LayoutParams params = new WindowManager.LayoutParams(
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.TYPE_PHONE,
            WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
            PixelFormat.TRANSLUCENT);
    params.gravity = Gravity.LEFT | Gravity.CENTER_VERTICAL;

    windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
    frameLayout = new FrameLayout(this);

    LayoutInflater layoutInflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);

    // Here is the place where you can inject whatever layout you want in the frame layout
    layoutInflater.inflate(R.layout.custom_start_ride_back_button_over_map, frameLayout);

    ImageView backOnMap = (ImageView) frameLayout.findViewById(R.id.custom_drawover_back_button);
    backOnMap.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(BROADCAST_ACTION);
            intent.putExtra("RIDE_ID", str_ride_id);
            sendBroadcast(intent);

            //stopping the service
            FloatingOverMapIconService.this.stopSelf();
            CurrentJobDetail.isFloatingIconServiceAlive = false;
        }
    });

    windowManager.addView(frameLayout, params);
}
}

float 图标 Xml:-

<LinearLayout 
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">

<ImageView
    android:id="@+id/custom_drawover_back_button"
    android:layout_width="70dp"
    android:layout_height="100dp"
    android:src="@drawable/common_full_open_on_phone"
    android:scaleType="center"
    android:background="@color/colorAccent"/>
</LinearLayout>

list 文件:-

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

<activity
        android:name=".Activities.YourActivity"
        android:launchMode="singleTop" />

<service
        android:name=".Utils.FloatingOverMapIconService"
        android:exported="false" />

关于android - 退出谷歌地图 Intent 在android中，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30838812/