我试图将 Qr 结果加载到 webview,但它只显示白屏。我做错了什么吗?
这是我的 MainActivity 包 com.project.ciisapp.ciis;
import android.app.Activity;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import com.google.zxing.integration.android.IntentIntegrator;
import com.google.zxing.integration.android.IntentResult;
public class ReaderActivity extends AppCompatActivity {
private Button database;
private Button scan_btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_reader);
database=(Button)findViewById(R.id.database);
scan_btn=(Button)findViewById(R.id.scan_btn);
database.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(ReaderActivity.this, Main2Activity.class));
}
});
final Activity activity=this;
scan_btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
IntentIntegrator integrator = new IntentIntegrator(activity);
integrator.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE_TYPES);
integrator.setPrompt("Scan");
integrator.setCameraId(0);
integrator.setBeepEnabled(false);
integrator.setBarcodeImageEnabled(false);
integrator.initiateScan();
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
if(result != null){
if(result.getContents()==null){
Toast.makeText(this, "You cancelled the scanning", Toast.LENGTH_LONG).show();
}
else {
Intent intent = new Intent(ReaderActivity.this, scannner.class);
intent.putExtra("QRurl",resultCode);
startActivity(intent);
}
}
else {
super.onActivityResult(requestCode, resultCode, data);
}
}
}
这是我的 webviewQR Activity ,我在其中发送了 qr 结果的结果
package com.project.ciisapp.ciis;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
public class scannner extends AppCompatActivity {
private WebView wvv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
wvv = (WebView)findViewById(R.id.wvv);
wvv.setWebChromeClient(new WebChromeClient());
String QRurl = getIntent().getExtras().getString("QRurl");
wvv.loadUrl(QRurl);
WebSettings webSettings = wvv.getSettings();
webSettings.setJavaScriptEnabled(true);
}
@Override
public void onBackPressed() {
if (wvv.canGoBack()){
wvv.goBack();
}else {
super.onBackPressed();
}
}
}
WebView
package com.project.ciisapp.ciis;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
public class Main2Activity extends AppCompatActivity {
private WebView wv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
wv = (WebView)findViewById(R.id.wv);
wv.setWebChromeClient(new WebChromeClient());
wv.loadUrl("http://peter42398.000webhostapp.com/");
WebSettings webSettings = wv.getSettings();
webSettings.setJavaScriptEnabled(true);
}
@Override
public void onBackPressed() {
if (wv.canGoBack()){
wv.goBack();
}else {
super.onBackPressed();
}
}
}
扫描仪正在工作,但是 webview 的按钮和 qr 导致 webview 导致我的应用程序崩溃
最佳答案
您正在使用 Intent 结果作为 Url 。这就是发生此错误的原因。
other activity receives it but it has error Unknown URL Scheme
你需要像这样在 ReaderActivity
中更改你的 onActivityResult
IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
if(result != null) {
if(result.getContents() == null) {
toast = "Cancelled from fragment";
} else {
Intent intent = new Intent(ReaderActivity.this, scannner.class);
intent.putExtra("QRurl",result.getContents());
startActivity(intent);
}
关于android - 使用 zxing 将 Qr 结果加载到 webview url,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/54418906/