Android实现打开系统照相机&相册图片展示

版权声明：如果需要引用文中内容，希望可以带上相应的链接地址，万分感谢。地址： https://blog.csdn.net/shaowanyunBLOG/article/details/71126790

Android实现打开系统照相机&相册图片展示

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

private Button btn_takephoto；

btn_takephoto = (Button) findViewById(R.id.btn_takephoto);

btn_takephoto.setOnClickListener(new OnClickListener() {
	@Override
	public void onClick(View v) {
	// TODO Auto-generated method stub
	Intent intent = new Intent();
	intent.setAction("android.media.action.IMAGE_CAPTURE");
	intent.addCategory("android.intent.category.DEFAULT");
	startActivity(intent);
	}

});

 （2）打开相册及展示

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")
	@Override
	protected 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")
		@Override
		public boolean onTouch(View view, MotionEvent ev) {
			// TODO Auto-generated method stub
			int 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() {

			@Override
			public void onClick(View v) {
			// TODO Auto-generated method stub
			Intent intent = new Intent();
			intent.setAction("android.media.action.IMAGE_CAPTURE");
			intent.addCategory("android.intent.category.DEFAULT");
			startActivity(intent);
		}

	});

		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));
	}

}
}

3.布局文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="${relativePackage}.${activityClass}" >

    <RelativeLayout
        android:id="@+id/rl"
        android:layout_width="match_parent"
        android:layout_height="55dp"
        android:background="#ff0000" >

        <Button
            android:id="@+id/photo_back"
            android:layout_width="45dp"
            android:layout_height="45dp"
            android:layout_marginTop="5dp"
            android:background="@drawable/back" >
        </Button>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"
            android:text="我的图片空间"
            android:textColor="#ffffff"
            android:textSize="25sp" />
    </RelativeLayout>
    
    <View
        android:id="@+id/top1"
        android:layout_width="match_parent"
        android:layout_height="2dp"
        android:background="#ff0000"
        android:layout_below="@+id/rl"
        android:layout_marginTop="25dp"></View>
    
    <View
        android:id="@+id/top2"
        android:layout_width="match_parent"
        android:layout_height="2dp"
        android:background="#ff0000"
        android:layout_below="@+id/img"
        android:layout_marginTop="20dp"></View>
    <View
        android:id="@+id/left"
        android:layout_width="2dp"
        android:layout_height="match_parent"
        android:background="#ff0000"
        android:layout_toLeftOf="@+id/btn_takephoto"
        android:layout_marginLeft="5dp"
        android:layout_marginTop="25dp"></View>
    
    <View
        android:id="@+id/right"
        android:layout_width="2dp"
        android:layout_height="match_parent"
        android:background="#ff0000"
        android:layout_toRightOf="@+id/btn_takephoto"
        android:layout_marginTop="20dp"></View>
    <View
        android:id="@+id/bottom1"
        android:layout_width="match_parent"
        android:layout_height="2dp"
        android:background="#ff0000"
        android:layout_below="@+id/img"
        android:layout_marginTop="25dp"></View>
    
    <View
        android:id="@+id/bottom2"
        android:layout_width="match_parent"
        android:layout_height="2dp"
        android:background="#ff0000"
        android:layout_below="@+id/rl"
        android:layout_marginTop="20dp"></View>

    <Button
        android:id="@+id/btn_takephoto"
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:layout_below="@+id/rl"
        android:layout_marginTop="50dp"
        android:background="#ff0000"
        android:text="打开照相机"
        android:layout_centerHorizontal="true"
        android:textColor="#ffffff"
        android:textSize="20sp" >
    </Button>

    <Button
        android:id="@+id/btn_choosephoto"
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:layout_below="@+id/btn_takephoto"
        android:layout_marginTop="15dp"
        android:layout_centerHorizontal="true"
        android:background="#ff0000"
        android:text="从相册中选择照片"
        android:textColor="#ffffff"
        android:textSize="20sp" >
    </Button>

    <ImageView
        android:id="@+id/img"
        android:layout_width="match_parent"
        android:layout_height="340dp"
        android:layout_below="@+id/btn_choosephoto"
        android:layout_marginLeft="15dp"
        android:layout_marginRight="15dp"
        android:layout_marginTop="15dp"
        android:background="@drawable/img" >
    </ImageView>


</RelativeLayout>