【发布时间】：2017-11-18 10:54:35
【问题描述】：
所以我已经这样做了 2 天，但它仍然无法正常工作。我尝试了一些 github 建议和堆栈溢出的建议，但都没有为我工作，谷歌视觉和斑马线（ZXing）有人可以帮助我吗？它显示了一个令人讨厌的白屏，我在 4.4.4 和 4.1.2 版本中尝试了这些。这是我的代码，我目前正在使用 Zxing 代码。
这是我的班级，其中按钮的数量是排列的。从这里我去扫描仪所在的班级，所以我可以扫描项目，然后从那里我将做其他功能。现在我的目标是能够扫描二维码并获得它的输入。我找到了一些关于如何获取输入的示例，所以这不是问题。 btu是的，它没有显示！
Normal.java
public class Normal extends AppCompatActivity {
Button suite, normal, room1, room2, room3, room4, room5, room6, room7, room8, room9, room10;
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mToggle;
private DatabaseReference mFirebaseDatabase1;
private FirebaseDatabase mFirebaseInstance;
//FIREBASE AUTH FIELDS
DatabaseReference mSearchedLocationReference;
DatabaseReference mSearchedLocationReference1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_normal);
mFirebaseInstance = FirebaseDatabase.getInstance();
//FIREBASE
mFirebaseDatabase1 = mFirebaseInstance.getReference("Rooms");
//FIREBASE PINPOINT
//DRAWER LAYOUT
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
mToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.open, R.string.close);
//navigation Drawer
mDrawerLayout.addDrawerListener(mToggle);
mToggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
NavigationView mNavigationView = (NavigationView) findViewById(R.id.nav_menu);
mNavigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
switch (menuItem.getItemId()) {
case (R.id.nav_logout):
Intent accountActivity4 = new Intent(getApplicationContext(), login1.class);
finish();
startActivity(accountActivity4);
break;
}
return true;
}
});
//Navigation Drawer
//ASSIGN ID's
room1 = (Button) findViewById(R.id.room2);
room2 = (Button) findViewById(R.id.room3);
room3 = (Button) findViewById(R.id.room4);
room4 = (Button) findViewById(R.id.room5);
room5 = (Button) findViewById(R.id.room6);
room6 = (Button) findViewById(R.id.room7);
room7 = (Button) findViewById(R.id.room8);
room8 = (Button) findViewById(R.id.room9);
room9 = (Button) findViewById(R.id.room10);
room10 = (Button) findViewById(R.id.room11);
//ASSIGN ID's
suite = (Button) findViewById(R.id.button2);
normal = (Button) findViewById(R.id.button);
suite.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent next = new Intent(Normal.this, Suite.class);
startActivity(next);
}
});
normal.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent next1 = new Intent(Normal.this, Normal.class);
startActivity(next1);
}
});
room1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startActivity(new Intent(Normal.this, room2.class));
}
});
room2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
IntentIntegrator integrator = new IntentIntegrator(this);
integrator.initiateScan();
}
});
room5.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startActivity(new Intent(Normal.this, room5.class));
}
});
mSearchedLocationReference.addValueEventListener(new ValueEventListener() { //attach listener
@Override
public void onDataChange(DataSnapshot dataSnapshot) { //something changed!
for (DataSnapshot locationSnapshot : dataSnapshot.getChildren()) {
String location = locationSnapshot.getValue().toString();
Log.d("Locations updated", "location: " + location); //log
if ( location.equals("Green")){
room1.setBackgroundColor(Color.GREEN);
}else if ( location.equals("Red")){
room1.setBackgroundColor(Color.RED);
}
else{
room1.setBackgroundColor(Color.YELLOW);
}
}
}
@Override
public void onCancelled(DatabaseError databaseError) { //update UI here if error occurred.
}
});
mSearchedLocationReference1.addValueEventListener(new ValueEventListener() { //attach listener
@Override
public void onDataChange(DataSnapshot dataSnapshot) { //something changed!
for (DataSnapshot locationSnapshot : dataSnapshot.getChildren()) {
String location = locationSnapshot.getValue().toString();
Log.d("Locations updated", "location: " + location); //log
if ( location.equals("Green")){
room2.setBackgroundColor(Color.GREEN);
}else if ( location.equals("Red")){
room2.setBackgroundColor(Color.RED);
}
else{
room2.setBackgroundColor(Color.YELLOW);
}
}
}
@Override
public void onCancelled(DatabaseError databaseError) { //update UI here if error occurred.
}
});
}
}
whenever i click room1, it won't got to the room2 class where I put the scanner:
room2.class
import me.dm7.barcodescanner.zxing.ZXingScannerView;
public class room2 extends AppCompatActivity implements ZXingScannerView.ResultHandler{
private ZXingScannerView zXingScannerView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_room2);
}
public void scan(View view){
zXingScannerView =new ZXingScannerView(getApplicationContext());
setContentView(zXingScannerView);
zXingScannerView.setResultHandler(this);
zXingScannerView.startCamera();
}
@Override
protected void onPause() {
super.onPause();
zXingScannerView.stopCamera();
}
@Override
public void handleResult(Result result) {
Toast.makeText(getApplicationContext(),result.getText(),Toast.LENGTH_SHORT).show();
}
}
这是我的清单，它有服务视觉，因为我一直在尝试这两个，但是确实请求了相机许可。
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.chanty.hoteltwoway">
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.autofocus" />
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.VIBRATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application
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"
android:name="android.support.multidex.MultiDexApplication" >
<activity android:name=".login">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MainActivity" />
<activity android:name=".Room" />
<activity android:name=".Suite" />
<activity android:name=".Normal" />
<activity android:name=".rooms.room1" />
<activity android:name=".rooms.room2" />
<activity android:name=".rooms.room3" />
<activity android:name=".rooms.room5" />
<activity android:name=".rooms.room6" />
<activity android:name=".rooms.room7" />
<activity android:name=".rooms.room8" />
<activity android:name=".rooms.room10" />
<activity android:name=".suites.suite1" />
<activity android:name=".suites.suite2" />
<activity android:name=".suites.suite3" />
<activity android:name=".suites.suite4" />
<activity android:name=".suites.suite5" />
<activity android:name=".suites.suite6" />
<activity android:name=".suites.suite7" />
<activity android:name=".suites.suite9" />
<activity android:name=".suites.suite8" />
<activity android:name=".suites.suite10" />
<activity android:name=".login1" />
<activity android:name=".MainActivity1" />
<activity android:name=".login2" />
<activity android:name=".Room1" />
<activity android:name=".Normal1" />
<activity android:name=".Suite1" />
<activity android:name=".suprooms.suproom1" />
<activity android:name=".suprooms.suproom2" />
<activity android:name=".suprooms.suproom3" />
<activity android:name=".suprooms.suproom4" />
<activity android:name=".suprooms.suproom5" />
<activity android:name=".suprooms.suproom6" />
<activity android:name=".suprooms.suproom7" />
<activity android:name=".suprooms.suproom8" />
<activity android:name=".suprooms.suproom9" />
<activity android:name=".suprooms.suproom10" />
<activity android:name=".supsuites.supsuite1"></activity>
<meta-data android:name="com.google.android.gms.vision.DEPENDENCIES" android:value="barcode"/>
</application>
</manifest>
很多依赖，因为是的，我从第一天开始就一直在测试东西 这是我的毕业典礼
apply plugin: 'com.android.application'
android {
compileSdkVersion 26
buildToolsVersion "26.0.2"
defaultConfig {
applicationId "com.example.chanty.hoteltwoway"
minSdkVersion 15
targetSdkVersion 26
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
multiDexEnabled true
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'me.dm7.barcodescanner:zxing:1.7.2'
compile 'com.google.android.gms:play-services-vision:10.0.1'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
compile 'com.google.firebase:firebase-database:10.0.1'
compile 'com.google.firebase:firebase-auth:10.0.1'
compile 'com.android.support:multidex:1.0.1'
compile 'com.android.support:design:26.+'
compile 'com.android.support:appcompat-v7:26.+'
compile 'com.google.firebase:firebase-core:10.0.1'
testCompile 'junit:junit:4.12'
}
// Add to the bottom of the file
apply plugin: 'com.google.gms.google-service
我尝试根据某些来源降级斑马线依赖项，以便它可能工作。但是，是的，它不起作用，你们能帮我弄清楚我做错了什么吗？
【问题讨论】：
标签： android-studio zxing barcode-scanner