Androd选取相册照片和拍照处理-android学习之旅(62)

实现如下图所示效果

核心代码 -构建打开相册和拍照的Intent

拍照

 File outputImage = new File(Environment.getExternalStorageDirectory(),"tempImage.jpg");
                try {
                    if (outputImage.exists()){
                        outputImage.delete();
                    }
                    outputImage.createNewFile();
                }catch (Exception e){
                    e.printStackTrace();
                }
                imageUri = Uri.fromFile(outputImage);
                Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
                intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri);
                startActivityForResult(intent,TAKE_PHOTO);

打开相册

File outputFile = new File(Environment.getExternalStorageDirectory(),"output_image.jpg");
                try {
                    if (outputFile.exists()){
                        outputFile.delete();
                    }
                    outputFile.createNewFile();
                }catch (Exception e){
                    e.printStackTrace();
                }
                imageUri = Uri.fromFile(outputFile);
                Intent intent = new Intent("android.intent.action.GET_CONTENT");
                intent.setType("image/*");
                intent.putExtra("crop",true);
                intent.putExtra("scale",true);
                intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri);
                startActivityForResult(intent,CROP_PHOTO);

整体代码

package com.example.euler_kalvinhe.takephoto;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

import java.io.File;

public class MainActivity extends Activity {
    private static final int TAKE_PHOTO = 1;
    private static final int CROP_PHOTO = 2;
    private Button takePhoto;
    private ImageView picture;
    private Uri imageUri;
    private Button choose;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        takePhoto = (Button) findViewById(R.id.button);
        picture = (ImageView) findViewById(R.id.image);
        choose = (Button) findViewById(R.id.choosePhoto);
        choose.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                File outputFile = new File(Environment.getExternalStorageDirectory(),"output_image.jpg");
                try {
                    if (outputFile.exists()){
                        outputFile.delete();
                    }
                    outputFile.createNewFile();
                }catch (Exception e){
                    e.printStackTrace();
                }
                imageUri = Uri.fromFile(outputFile);
                Intent intent = new Intent("android.intent.action.GET_CONTENT");
                intent.setType("image/*");
                intent.putExtra("crop",true);
                intent.putExtra("scale",true);
                intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri);
                startActivityForResult(intent,CROP_PHOTO);
            }
        });
        takePhoto.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                File outputImage = new File(Environment.getExternalStorageDirectory(),"tempImage.jpg");
                try {
                    if (outputImage.exists()){
                        outputImage.delete();
                    }
                    outputImage.createNewFile();
                }catch (Exception e){
                    e.printStackTrace();
                }
                imageUri = Uri.fromFile(outputImage);
                Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
                intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri);
                startActivityForResult(intent,TAKE_PHOTO);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode){
            case TAKE_PHOTO:
                if (resultCode == RESULT_OK){
                    Intent intent = new Intent("com.android.camera.action.CROP");
                    intent.setDataAndType(imageUri,"image/*");
                    intent.putExtra("scale",true);
                    intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri);
                    startActivityForResult(intent,CROP_PHOTO);
                }
                break;
            case CROP_PHOTO:
                if (resultCode == RESULT_OK){
                    try{
                        Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri));
                        picture.setImageBitmap(bitmap);
                    }catch (Exception e){
                        e.printStackTrace();
                    }
                }
                break;
            default:
                break;
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}