我有一个活动,它有一个按钮.当我点击按钮时,它会将我重定向到图库.我想使用图像视图在下一个活动中显示所选图像.但它没有显示图像.设置图像时,视图不在屏幕上.
下面给出了我选择图像和下一步的代码.我在我的活动中没有使用历史真实.
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK
&& null != data) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
if (!(picturePath.equals(""))) {
Intent intent = new Intent();
intent.setClass(MainActivity.this, ImageInGellary.class);
intent.putExtra("picturePath", picturePath);
startActivity(intent);
}
}
}
public class ImageInGellary extends Activity {
Button cancel; …我正在尝试使用Spring编写DAO测试.当我运行测试时,它会出现以下堆栈跟踪错误.当我相信我包含正确版本的JUnit时,我不知道为什么会出现错误.
java.lang.ExceptionInInitializerError
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:31)
at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:24)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57)
at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:29)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57)
at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:24)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createUnfilteredTest(JUnit4TestLoader.java:84)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:70)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:43)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:444)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.IllegalStateException: SpringJUnit4ClassRunner requires JUnit 4.12 or higher.
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.<clinit>(SpringJUnit4ClassRunner.java:102)
... 17 more
我不明白的是,在我的pom.xml中,我包含了JUnit 4.9(我检查了JUnit的已解析依赖项,它也表示4.9):
<dependencies>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${org.springframework-version}</version>
<exclusions>
<!-- Exclude Commons Logging in favor of SLF4j -->
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId> …在模拟器(我使用genymotion)它工作正常,但当我在真实设备上运行它(我的手机是华硕ZenFone Laser 5.0)抛出filenotfoundexception
java.io.FileNotFoundException:/storage/emulated/0/cam20160926_075819.jpg:open failed:EACCES(权限被拒绝)
imgBitmap = MediaStore.Images.Media.getBitmap(cr,selectedImage);
这是onActivityResult()的方法
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode){
case CAMERA_REQUEST:
if (resultCode == Activity.RESULT_OK){
Uri selectedImage = imageUri;
getActivity().getContentResolver().notifyChange(selectedImage, null);
ContentResolver cr = getActivity().getContentResolver();
Bitmap imgBitmap;
try {
imgBitmap = MediaStore.Images.Media.getBitmap(cr, selectedImage);
accountPhoto.setImageBitmap(imgBitmap);
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(getActivity().getApplicationContext(), "Something went wrong while taking a photo", Toast.LENGTH_LONG).show();
Log.e("Camera", e.toString());
}
}
}
}
我阅读了有关此EACCES的一些相关问题和解决方案,似乎问题出在我的允许之下:
<uses-feature android:name="android.hardware.camera2" android:required="true"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" android:maxSdkVersion="18"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> …目前我安装了 H2 数据库，但是当我启动程序并尝试从我的浏览器（http://localhost:8082/login.do）访问它时，我收到此错误：
IO Exception: "/root/test outside /opt/h2/DB" [90028-192] 90028/90028 (Aide) org.h2.jdbc.JdbcSQLException: IO Exception: "/root/test outside /opt/h2/DB" [90028-192]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:345)
at org.h2.message.DbException.get(DbException.java:179)
at org.h2.message.DbException.get(DbException.java:155)
at org.h2.engine.ConnectionInfo.setBaseDir(ConnectionInfo.java:182)
at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:114)
at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:102)
at org.h2.Driver.connect(Driver.java:72)
at org.h2.server.web.WebServer.getConnection(WebServer.java:735)
at org.h2.server.web.WebApp.login(WebApp.java:955)
at org.h2.server.web.WebApp.process(WebApp.java:211)
at org.h2.server.web.WebApp.processRequest(WebApp.java:170)
at org.h2.server.web.WebThread.process(WebThread.java:133)
at org.h2.server.web.WebThread.run(WebThread.java:89)
at java.lang.Thread.run(Thread.java:745)
我该如何解决这个问题？
我在正则表达式是新的,我想至少有6个字符,并验证字以内30,应该只包含字母开始,但它可以包含数字和下划线从第二position.I开始用这个模式,但它在测试中失败了.
String pattern = "^[A-Za-z][A-Za-z0-9_]*{6,30}$";
我正在尝试将 .bz2 文件导入 MySql 数据库，但收到此错误：
Fatal error: Out of memory (allocated 386400256) (tried to allocate 378535937 bytes) in C:\wamp\apps\phpmyadmin4.6.4\libraries\plugins\import\ImportXml.php on line 90
我在这里尝试了很多解决方案，包括upload_max_filesize提高memory_limit和post_max_size
任何帮助将非常感激！
我是 SDL 和游戏开发的新手。我想制作一个游戏，我需要在游戏窗口中放置一个“开始”按钮。所以请任何人都可以帮助我如何做到这一点？整个屏幕没有鼠标事件我只想创建一个按钮来点击它，我可以在哪里插入按钮的代码？这是我的代码：
int main (int argc, char *argv[]){
int quit = 0;
SDL_Init(SDL_INIT_VIDEO);
SDL_Window* window = NULL;
window = SDL_CreateWindow("Snaykie v1.0",350, 150, 800, 500, SDL_WINDOW_SHOWN);
if (window == NULL){
std::cout << "Can not open the game" << std::endl;
return 0;
}
SDL_Renderer* renderer = NULL;
renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
SDL_Event* evt = new SDL_Event();
SDL_Texture* txt = NULL;
txt = IMG_LoadTexture(renderer, "mainview.bmp");
SDL_Rect rct;
rct.x = 0 ;
rct.y = 0;
rct.h = 500;
rct.w = 800;
SDL_Surface …