page_qr.java
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package etelligens.com.foodsafety;
import android.Manifest;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Vibrator;
import android.provider.Settings;
import android.util.LruCache;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import java.util.ArrayList;
import java.util.List;
import cn.bingoogolapple.qrcode.core.QRCodeView;
import cn.bingoogolapple.qrcode.zbar.ZBarView;
import etelligens.com.foodsafety.activities.dashboard.Dashboard;
import etelligens.com.foodsafety.fragments.PrinterSettingsMileageFrag;
import static etelligens.com.foodsafety.activities.dashboard.SharedHelper.sharedPreferences;
public class page_qr extends AppCompatActivity {
QRCodeView qrCodeView;
String[] permissions = new String[]{
Manifest.permission.CAMERA,
Manifest.permission.VIBRATE
};
private final int permissionCode = 100;//权限请求码
//检查权限
private void checkPermission() {
List<String> permissionList = new ArrayList<>();
for (int i = 0; i < permissions.length; i++) {
if (ContextCompat.checkSelfPermission(this, permissions[i]) != PackageManager.PERMISSION_GRANTED) {
permissionList.add(permissions[i]);
}
}
if (permissionList.size() <= 0) {
//说明权限都已经通过，可以做你想做的事情去
bindEvent();
} else {
//存在未允许的权限
ActivityCompat.requestPermissions(this, permissions, permissionCode);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
boolean haspermission = false;
if (permissionCode == requestCode) {
for (int i = 0; i < grantResults.length; i++) {
if (grantResults[i] == -1) {
haspermission = true;
}
}
if (haspermission) {
//跳转到系统设置权限页面，或者直接关闭页面，不让他继续访问
permissionDialog();
} else {
//全部权限通过，可以进行下一步操作
bindEvent();
}
}
}
AlertDialog alertDialog;
//打开手动设置应用权限
private void permissionDialog() {
if (alertDialog == null) {
alertDialog = new AlertDialog.Builder(this)
.setTitle("提示信息")
.setMessage("当前应用缺少必要权限，该功能暂时无法使用。如若需要，请单击【确定】按钮前往设置中心进行权限授权。")
.setPositiveButton("设置", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
cancelPermissionDialog();
Uri packageURI = Uri.parse("package:" + getPackageName());
Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS, packageURI);
startActivity(intent);
}
})
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
cancelPermissionDialog();
}
})
.create();
}
alertDialog.show();
}
private void cancelPermissionDialog() {
alertDialog.cancel();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_page_qr);
//6.0才用动态权限
if (Build.VERSION.SDK_INT >= 23) {
checkPermission();
} else {
bindEvent();
}
}
private void bindEvent() {
qrCodeView = (ZBarView) findViewById(R.id.zbarview);
qrCodeView.setDelegate(new QRCodeView.Delegate() {
@Override
public void onScanQRCodeSuccess(String result) {
vibrate();//震动手机
//扫描成功后处理事件
Toast.makeText(page_qr.this, result, Toast.LENGTH_SHORT).show();
// qrCodeView.startSpot();//继续扫描
// 获取 SharedPreferences 对象
SharedPreferences.Editor editor = getSharedPreferences("RechargeNumberFile",MODE_PRIVATE).edit();
// 存储数据（键值对）
editor.putString("rechargeNumber", result);// 存储字符串
// 应用编辑（提交保存）
editor.apply();
// LruCache<String, String> memoryCache = new LruCache<>(100);
// memoryCache.put("consumableNumber", result);
Intent intent = new Intent(page_qr.this, Dashboard.class);
intent.putExtra("fragmentId",1);
startActivity(intent);
//finish();
TextView txtText = (TextView) findViewById(R.id.txtText);
txtText.setText(result);
}
@Override
public void onCameraAmbientBrightnessChanged(boolean isDark) {
// 这里是通过修改提示文案来展示环境是否过暗的状态，接入方也可以根据 isDark 的值来实现其他交互效果
String tipText = qrCodeView.getScanBoxView().getTipText();
String ambientBrightnessTip = "\n环境过暗，请打开闪光灯";
if (isDark) {
if (!tipText.contains(ambientBrightnessTip)) {
qrCodeView.getScanBoxView().setTipText(tipText + ambientBrightnessTip);
}
} else {
if (tipText.contains(ambientBrightnessTip)) {
tipText = tipText.substring(0, tipText.indexOf(ambientBrightnessTip));
qrCodeView.getScanBoxView().setTipText(tipText);
}
}
}
@Override
public void onScanQRCodeOpenCameraError() {
Toast.makeText(page_qr.this, "错误", Toast.LENGTH_SHORT).show();
}
});
qrCodeView.startCamera();
findViewById(R.id.end_spot).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(page_qr.this, Dashboard.class);
intent.putExtra("fragmentId",1);
startActivity(intent);
//finish();
}
});
findViewById(R.id.start_spot).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onStart();
Toast.makeText(page_qr.this, "开始扫码", Toast.LENGTH_SHORT).show();
}
});
findViewById(R.id.stop_spot).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
onStop();
Toast.makeText(page_qr.this, "停止扫码", Toast.LENGTH_SHORT).show();
}
});
findViewById(R.id.open_flashlight).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
qrCodeView.openFlashlight();
Toast.makeText(page_qr.this, "打开闪光灯", Toast.LENGTH_SHORT).show();
}
});
findViewById(R.id.close_flashlight).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
qrCodeView.closeFlashlight();
Toast.makeText(page_qr.this, "关闭闪光灯", Toast.LENGTH_SHORT).show();
}
});
}
@Override
protected void onStart() {
super.onStart();
qrCodeView.startCamera();//打开后置摄像头开始预览，但是并未开始识别
qrCodeView.startSpotAndShowRect(); // 显示扫描框，并开始识别
// mQRCodeView.showScanRect();//显示扫描框
// mQRCodeView.startSpot();//开始识别二维码
//mQRCodeView.openFlashlight();//开灯
//mQRCodeView.closeFlashlight();//关灯
}
@Override
protected void onStop() {
qrCodeView.stopCamera();// 关闭摄像头预览，并且隐藏扫描框
super.onStop();
}
@Override
protected void onDestroy() {
qrCodeView.onDestroy();
super.onDestroy();
}
private void vibrate() {
Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
vibrator.vibrate(200);
}
}