Android实现打开系统照相机&相册图片展示
16lz
2021-01-24
Android实现打开系统照相机&相册图片展示
注:本文所讲内容已在另一篇博客中更新和拓展,详情可以移步查看:https://blog.csdn.net/shaowanyunBLOG/article/details/82252248
Android系统本身提供了非常多的多媒体应用的API可供开发人员使用开发功能多彩多样的app,那么,因为之前自己完成的一个小小的app里面刚好我就用到了“打开系统照相机和打开相册”这两个部分的功能然后完成一个“图片空间”的这样一个子模块的功能。然后我接下来就会把我的代码给出来,然后大致上介绍一下怎样实现具体的功能。
1.主要功能java代码
(1)打开系统照相机
(2)打开相册及展示private Button btn_takephoto;btn_takephoto = (Button) findViewById(R.id.btn_takephoto);btn_takephoto.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent intent = new Intent();intent.setAction("android.media.action.IMAGE_CAPTURE");intent.addCategory("android.intent.category.DEFAULT");startActivity(intent);}});
private Button btn_choosephoto;private ImageView img;btn_choosephoto.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Intent i = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); startActivityForResult(i, RESULT_LOAD_IMAGE); } });protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) { Uri selectedImage = data.getData(); String[] filePathColumn = { MediaStore.Images.Media.DATA }; Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null); cursor.moveToFirst(); int columnIndex = cursor.getColumnIndex(filePathColumn[0]); String picturePath = cursor.getString(columnIndex); cursor.close(); img.setImageBitmap(BitmapFactory.decodeFile(picturePath)); }}
2.完整java代码
import com.example.mynote.R;import android.annotation.SuppressLint;import android.app.Activity;import android.content.Intent;import android.database.Cursor;import android.graphics.BitmapFactory;import android.net.Uri;import android.os.Bundle;import android.provider.MediaStore;import android.support.v4.content.ContextCompat;import android.view.MotionEvent;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ImageView;public class PhotoActivity extends Activity {protected static final int RESULT_LOAD_IMAGE = 0;private Button btn_takephoto, btn_choosephoto, photo_back;private ImageView img;@SuppressLint("ServiceCast")@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_shake);btn_takephoto = (Button) findViewById(R.id.btn_takephoto);btn_choosephoto = (Button) findViewById(R.id.btn_choosephoto);photo_back = (Button) findViewById(R.id.photo_back);img = (ImageView) findViewById(R.id.img);// 返回键设置点击事件photo_back.setOnTouchListener((new View.OnTouchListener() {@SuppressLint("ClickableViewAccessibility")@Overridepublic boolean onTouch(View view, MotionEvent ev) {// TODO Auto-generated method stubint action = ev.getAction();switch (action) {case MotionEvent.ACTION_DOWN:photo_back.setBackground(ContextCompat.getDrawable(getApplicationContext(), R.drawable.back_click));break;case MotionEvent.ACTION_UP:photo_back.setBackground(ContextCompat.getDrawable(getApplicationContext(), R.drawable.back));Intent intent = new Intent(getApplicationContext(), ChooseActivity.class);startActivity(intent);}return false;}}));btn_takephoto.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent intent = new Intent();intent.setAction("android.media.action.IMAGE_CAPTURE");intent.addCategory("android.intent.category.DEFAULT");startActivity(intent);}});btn_choosephoto.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent i = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);startActivityForResult(i, RESULT_LOAD_IMAGE);}});}protected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {Uri selectedImage = data.getData();String[] filePathColumn = { MediaStore.Images.Media.DATA };Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);cursor.moveToFirst();int columnIndex = cursor.getColumnIndex(filePathColumn[0]);String picturePath = cursor.getString(columnIndex);cursor.close();img.setImageBitmap(BitmapFactory.decodeFile(picturePath));}}}
3.布局文件
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