希望懂的大佬能帮帮忙,救救我,这个问题困扰我好久了,这个问题没解决就无法进行下一步。
1.最近使用Android studio编写了一个程序,写好代码后运行app到模拟器的时候会闪退(创建时程序版本和模拟器版本相同为5.1)。没有写代码时(也就是刚创建好程序,没添加任何东西时),在模拟器中能正常运行,但是当我写好代码后,运行app到模拟器上就会闪退了。
2.在代码部分,我是根据的SuperMap iMobile 9D(2019) for Android Guide的指导书写的,现在我也配置了许可,但还是会闪退
3.各个部分的代码如下:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.loadscence">
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
<uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:configChanges="keyboardHidden|orientation|screenSize"
>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<supports-screens
android:largeScreens="true"
android:resizeable="true"
android:normalScreens="true"
android:anyDensity="true"/>
</manifest>
///////////////////////////////////////////////////////////这是mainactivity.java的代码
package com.example.loadscence;
import androidx.appcompat.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ZoomControls;
import com.supermap.data.Environment;
import com.supermap.data.Workspace;
import com.supermap.data.WorkspaceConnectionInfo;
import com.supermap.data.WorkspaceType;
import com.supermap.mapping.MapControl;
import com.supermap.mapping.MapView;
public class MainActivity extends AppCompatActivity {
private MapControl m_mapcontrol = null;
private Workspace m_workspace;
private MapView m_mapView;
private ZoomControls m_zoom;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//设置一些系统需要用到的路径
String rootPath =
android.os.Environment.getExternalStorageDirectory().getAbsolutePath();
Environment. setLicensePath (rootPath + "/SuperMap/license/");
Environment. setTemporaryPath (rootPath + "/SuperMap/temp/");
Environment. setWebCacheDirectory (rootPath + "/SuperMap/WebCatch");
//组件功能必须在 Environment 初始化之后才能调用
Environment. initialization (this);
//如果机器中默认不包括需要显示的字体,可以把相关字体文件放在参数所代表的路径中。
//例如,如果需要显示阿拉伯文字(若机器中原先不包括相关字体文件),可以把需要的字体文件放在参数所代表的路径中。
Environment. setFontsPath (rootPath + "/SuperMap/fonts/");
setContentView(R.layout. activity_main );
//打开工作空间
m_workspace = new Workspace();
WorkspaceConnectionInfo info = new WorkspaceConnectionInfo();
info.setServer(rootPath + "/SampleData/GeometryInfo/World.smwu");
info.setType(WorkspaceType. SMWU );
m_workspace.open(info);
//将地图显示控件和工作空间关联
m_mapView = (MapView)findViewById(R.id. Map_view );
m_mapcontrol = m_mapView.getMapControl();
m_mapcontrol.getMap().setWorkspace(m_workspace);
//打开工作空间中的第二幅地图
String mapName = m_workspace.getMaps().get(1);
m_mapcontrol.getMap().open(mapName);
m_zoom = (ZoomControls)findViewById(R.id. zoomControls1 );
m_mapView = (MapView)findViewById(R.id. Map_view );
m_zoom.setIsZoomInEnabled(true);
m_zoom.setIsZoomOutEnabled(true);
//放大按钮
m_zoom.setOnZoomInClickListener(new OnClickListener() {
public void onClick(View v) {
m_mapcontrol.getMap().zoom(2);
m_mapcontrol.getMap().refresh();
}
});
//缩小按钮
m_zoom.setOnZoomOutClickListener(new OnClickListener(){
public void onClick(View v) {
m_mapcontrol.getMap().zoom(0.5);
m_mapcontrol.getMap().refresh();
}
});
m_mapcontrol.getMap().refresh();
}
}
///////////////////////////////////////////////////////////这是activity的代码
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/main">
<RelativeLayout
android:gravity="left"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.supermap.mapping.MapView
android:id = "@+id/Map_view"
android:layout_width="match_parent"
android:layout_height = "match_parent">
</com.supermap.mapping.MapView>
<ZoomControls
android:id="@+id/zoomControls1"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_centerHorizontal="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</ZoomControls>
</RelativeLayout>
</RelativeLayout>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
///////////////////////////////////////////////////////////报错日志如下:
03-23 22:32:10.438 22856-22856/com.example.loadscence E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.loadscence, PID: 22856
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.loadscence/com.example.loadscence.MainActivity}: java.lang.NullPointerException: Attempt to get length of null array
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.NullPointerException: Attempt to get length of null array
at com.supermap.data.Environment.checkAndLoadLibrary64(Environment.java:1632)
at com.supermap.data.Environment.initialization(Environment.java:576)
at com.example.loadscence.MainActivity.onCreate(MainActivity.java:33)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)