二维码的生成与扫描

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:orientation="vertical"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.bwie.erweima_zxing.MainActivity">

<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="scan"
android:text="扫描二维码" />
 <TextView
android:id="@+id/tv_ruselt"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="26sp" />

<EditText
android:id="@+id/et_text"
android:layout_width="match_parent"
android:layout_height="wrap_content" />

<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="make"
android:text="生成二维码" />

<CheckBox
android:id="@+id/is_logo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="check" />

<ImageView
android:id="@+id/img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:src="@mipmap/ic_launcher" />
</LinearLayout>

package com.bwie.erweima_zxing;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;

import com.xys.libzxing.zxing.activity.CaptureActivity;
import com.xys.libzxing.zxing.encoding.EncodingUtils;

public class MainActivity extends AppCompatActivity {
private TextView mTv_Ruslet;
private EditText mInput;
private ImageView mImg;
private CheckBox isLogo;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTv_Ruslet = (TextView) findViewById(R.id.tv_ruselt);
mInput = (EditText) findViewById(R.id.et_text);
mImg = (ImageView) findViewById(R.id.img);
isLogo = (CheckBox) findViewById(R.id.is_logo);
}
//生成二维码
public void make(View view){
String input=mInput.getText().toString().trim();
//生成二维码，然后为二维码增加logo
Bitmap bitmap= EncodingUtils.createQRCode(input,500,500,isLogo.isChecked() ? BitmapFactory.decodeResource(getResources(),  R.mipmap.ic_launcher) : null
);
mImg.setImageBitmap(bitmap);
}
//扫描二维码
public void scan(View view){
startActivityForResult(new Intent(MainActivity.this, CaptureActivity.class), 0);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(resultCode==RESULT_OK){
Bundle bundle=data.getExtras();
String result=bundle.getString("result");
mTv_Ruslet.setText(result);
mInput.setText(result);
}else if(resultCode==RESULT_CANCELED){
mTv_Ruslet.setText("扫描出错");
}
}

}