Android 点击按钮,打开相机拍照,
显示照片,并把照片转Base64格式打印
依赖:
dependencies {
// 相机拍照依赖
implementation 'com.mindorks:paracamera:0.2.2'
}
<!--相机权限-->
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<!--文件读取权限-->
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
主页面布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:id="@+id/take_btn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="点击打开相机拍照" />
<ImageView
android:id="@+id/take_img"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_gravity="center_horizontal" />
<TextView
android:id="@+id/take_tv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="打印base64:" />
</LinearLayout>
主页面
package com.ksxy.myapp;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.util.Base64;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import com.mindorks.paracamera.Camera;
import java.io.ByteArrayOutputStream;
/**
* 拍照转Base64
* shenhuiran
*/
public class TakeActivity extends AppCompatActivity {
private Camera camera; // 相机
private ImageView takeImg; // 展示刚拍过的照片
private TextView takeTv; // 打印base64
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_take);
takeImg = (ImageView) findViewById(R.id.take_img);
takeTv = (TextView) findViewById(R.id.take_tv);
camera = new Camera.Builder() // 照相机
.resetToCorrectOrientation(true) // 它将从元数据中将相机位图旋转到正确的方向
.setTakePhotoRequestCode(1) // 拍照请求代码
.setDirectory("pics") // 目录
.setName("singpools_" + System.currentTimeMillis()) // 名称(“sing pools _”+系统当前时间Millis()
.setImageFormat(Camera.IMAGE_PNG) // 图像格式
.setCompression(75) // 压缩
.setImageHeight(300) // 图像高度
.build(this);
// 点击打开相机拍照
Button takeBtn = (Button) this.findViewById(R.id.take_btn);
takeBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
camera.takePicture(); // 相机拍照
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* 获取活动或片段的位图和图像路径onActivityResult
*
* @param requestCode
* @param resultCode
* @param data
*/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == Camera.REQUEST_TAKE_PHOTO) {
Bitmap bitmap = camera.getCameraBitmap();
if (bitmap != null) {
takeImg.setImageBitmap(bitmap); // 展示刚拍过的照片
getImgBase64(takeImg); // 直接把 imageview 取出图片转换为base64格式
} else {
Toast.makeText(this.getApplicationContext(), "Picture not taken!", Toast.LENGTH_SHORT).show();
}
}
}
/**
* imageview取出图片转换为base64格式
*
* @param imageView
* @return
*/
public String getImgBase64(ImageView imageView) {
BitmapDrawable drawable = (BitmapDrawable) imageView.getDrawable();
Bitmap bitmap = drawable.getBitmap();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, bos);
byte[] bb = bos.toByteArray();
String image = Base64.encodeToString(bb, Base64.NO_WRAP);
Log.d("111111" + " TakeActivity >>", "打印base64>>:" + image);
takeTv.setText("打印base64>>:" + image);
return image;
}
}
。。。