Java 无法解决类上的符号错误-Android Studio
我是新来的,所以请容忍我 我在类上遇到无法解析符号错误 我有一门课程,名为CameraPhotoActivity(以下简称CameraPhotoActivity): 下面这一节是我遇到问题的地方:Java 无法解决类上的符号错误-Android Studio,java,android,class,Java,Android,Class,我是新来的,所以请容忍我 我在类上遇到无法解析符号错误 我有一门课程,名为CameraPhotoActivity(以下简称CameraPhotoActivity): 下面这一节是我遇到问题的地方: @Override public void onClick(View view) { startActivity(new Intent(getApplicationContext().UploadInfo.class)); } “UploadInfo.class
@Override
public void onClick(View view) {
startActivity(new Intent(getApplicationContext().UploadInfo.class));
}
“UploadInfo.class”上出现错误
这表明我没有一个名为“UploadInfo”的类,但正如您在下面看到的,我有:
package com.example.android.frapp;
import android.app.ProgressDialog;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import com.firebase.client.Firebase;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.storage.StorageReference;
public class UploadInfo extends AppCompatActivity {
Button selectImageBtn, uploadButton;
ImageView user_image;
TextView title;
public static final int READ_EXTERNAL_STORAGE = 0;
public static final int GALLERY_INTENT = 2;
private ProgressDialog mProgressDialog;
private Firebase mRoofRef;
private Uri mImageUri = null;
private DatabaseReference mDatabaseRef;
private StorageReference mStorage;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.uploading_layout);
Firebase.setAndroidContext(this);
selectImageBtn = (Button) findViewById(R.id.selectImageBtn);
uploadButton = (Button) findViewById(R.id.uploadButton);
user_image = (ImageView) findViewById(R.id.user_image);
title = (TextView) findViewById(R.id.etTitle);
// inititalise the progress bar
mProgressDialog = new ProgressDialog(UploadInfo.this);
}
}
下面是清单文件,您将看到我在其中添加了“UploadInfo”类:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.android.frapp">
<uses-feature android:name="android.hardware.camera2" android:required="true"></uses-feature>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CAMERA"></uses-permission>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
<application
android:name=".FireApp"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".SplashActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MainLoginActivity" />
<activity android:name=".MainActivity" />
<activity
android:name=".Login"
android:label="@string/title_activity_login"
android:theme="@style/AppTheme" />
<activity
android:name=".LoginScreenActivity"
android:label="@string/title_activity_login_screen"
android:parentActivityName=".MainActivity"
android:theme="@style/AppTheme">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.android.frapp.MainActivity" />
</activity>
<activity
android:name=".CreateCaseActivity"
android:label="@string/title_activity_create_case"
android:theme="@style/AppTheme" />
<activity
android:name=".NoteTakerActivity"
android:label="@string/title_activity_note_taker"
android:theme="@style/AppTheme" />
<activity android:name=".AddMainNotesActivity"></activity>
<activity android:name=".CameraPhotoActivity"></activity>
<activity android:name=".CameraVideoActivity"></activity>
<activity android:name=".AudioActivity"></activity>
<activity android:name=".UploadInfo"></activity>
</application>
我尝试了以下方法:
请帮助将行更改为:
startActivity(new Intent(CameraPhotoActivity.this , UploadInfo.class));
成功了。我知道这很简单。我早该知道的。我觉得现在问这个问题很愚蠢好吧点击勾号接受我的答案!还有一个逻辑是,你没有用逗号(,),而是用了一个点(.)。甚至getApplication也可以工作。好吧,接受答案,因为你问了,只有你能接受。堆栈溢出样式@Padamso毕竟这实际上是因为我放了一个点而不是逗号?该死的。现在我感觉更傻了哦,一点问题都没有,我们都有这样的时刻,我记得我在stackoverflow中的第一个问题是我忘记了右括号
}
。哈哈哈,很好,再次感谢你。我只花了大约一个小时来修复它,现在把你的logcat错误信息都整理好了。无论如何谢谢你
apply plugin: 'com.android.application'
android {
compileSdkVersion 27
defaultConfig {
applicationId "com.example.android.frapp"
minSdkVersion 19
targetSdkVersion 27
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
packagingOptions {
exclude 'META-INF/LICENSE'
exclude 'META-INF/NOTICE'
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
//noinspection GradleCompatible
implementation 'com.android.support:appcompat-v7:27.0.2'
implementation 'com.android.support:design:27.0.2'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
implementation 'com.android.support:support-v4:27.0.2'
implementation 'com.google.firebase:firebase-messaging:11.6.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.1'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
compile 'com.google.firebase:firebase-database:11.6.2'
compile 'com.google.firebase:firebase-crash:11.6.2'
compile 'com.google.firebase:firebase-auth:11.6.2'
compile 'com.google.firebase:firebase-storage:11.6.2'
compile 'com.firebase:firebase-client-android:2.5.2'
compile 'com.google.firebase:firebase-core:11.6.2'
compile 'com.firebaseui:firebase-ui-storage:1.2.0'
compile 'com.firebaseui:firebase-ui-database:1.2.0'
compile 'com.github.bumptech.glide:glide:3.7.0'
compile 'com.android.support:cardview-v7:27.0.2'
compile 'com.android.support:recyclerview-v7:27.0.2'
implementation 'com.android.support:cardview-v7:27.0.2'
compile 'com.squareup.picasso:picasso:2.5.2'
// Firebase UI
compile 'com.firebaseui:firebase-ui-database:3.1.2'
compile 'com.android.support:recyclerview-v7:27.0.2'
}
apply plugin: 'com.google.gms.google-services'
startActivity(new Intent(CameraPhotoActivity.this , UploadInfo.class));