场景
点击拍照按钮调用系统摄像机进行拍照,并将拍的照片显示在ImageView中。
注:
博客:
https://blog.csdn.net/badao_liumang_qizhi
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实现
新建一个Activity,设计其布局如下
布局xml文件为
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".CameraActivity"> <Button android:id="@+id/button" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="启动摄像头" /> <ImageView android:id="@+id/iv_camera" android:layout_width="350dp" android:layout_height="350dp" android:layout_gravity="center" android:layout_marginTop="20dp" /> </LinearLayout>
然后在对应的Activity中,通过指定Action的Intent来调用系统摄像头,并采用带返回结果的方式启动Activity,
然后在重写的获取Activity返回结果的方法中,判断请求码与上面自定义的常量一致并且请求结果为OK
那么通过将data强转为Bitmap并给ImageView设置数据源进行显示
package com.badao.androidstudy; import androidx.annotation.Nullable; import androidx.appcompat.app.AppCompatActivity; import android.content.Intent; import android.graphics.Bitmap; import android.os.Bundle; import android.provider.MediaStore; import android.view.View; import android.widget.Button; import android.widget.ImageView; public class CameraActivity extends AppCompatActivity { private Button btnCamera; private ImageView imageView; private final int CAMERA_REQUEST = 10; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_camera); initView(); } @Override protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); switch (requestCode) { case CAMERA_REQUEST: if (resultCode == RESULT_OK) { Bitmap bitmap = (Bitmap) data.getExtras().get("data"); imageView.setImageBitmap(bitmap); } break; } } public void initView(){ imageView = findViewById(R.id.iv_camera); btnCamera = findViewById(R.id.button); btnCamera.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); startActivityForResult(intent,CAMERA_REQUEST); } }); } }
示例效果