android编程实现系统图片剪裁的方法_Android

android编程实现系统图片剪裁的方法

2021-04-09 14:13年轻的zhangchang Android

这篇文章主要介绍了android编程实现系统图片剪裁的方法,涉及Android针对图片的获取、修改、保存等操作的相关技巧,具有一定参考借鉴价值,需要的朋友可以参考下

本文实例讲述了android编程实现系统图片剪裁的方法。分享给大家供大家参考，具体如下：

									package cn.test;

									import java.io.File;

									import java.text.SimpleDateFormat;

									import java.util.Date;

									import android.app.Activity;

									import android.content.ContentResolver;

									import android.content.ContentUris;

									import android.content.Intent;

									import android.database.Cursor;

									import android.graphics.Bitmap;

									import android.net.Uri;

									import android.os.Bundle;

									import android.provider.MediaStore;

									import android.view.View;

									import android.view.View.OnClickListener;

									import android.widget.Button;

									import android.widget.ImageView;

									public class CutActivity extends Activity {

									 private Button button;

									 private ImageView imageView;

									 private File mCurrentPhotoFile;

									 private Bitmap cameraBitmap;

									 @Override

									 public void onCreate(Bundle savedInstanceState) {

									  super.onCreate(savedInstanceState);

									  setContentView(R.layout.main);

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

									  imageView = (ImageView) findViewById(R.id.imageView);

									  button.setOnClickListener(new OnClickListener() {

									   @Override

									   public void onClick(View v) {

									    Intent intent = new Intent(

									    "android.media.action.IMAGE_CAPTURE");

									    mCurrentPhotoFile = new File(

									      "mnt/sdcard/DCIM/Camera/",

									      getPhotoFileName());

									   intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(mCurrentPhotoFile));

									  startActivityForResult(

									    intent,

									    Activity.DEFAULT_KEYS_DIALER);

									   }

									  });

									 }

									 @Override

									 protected void onActivityResult(int requestCode, int resultCode, Intent data) {

									  switch (requestCode) {

									  case 1:

									   Uri imgUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;

									   ContentResolver cr = CutActivity.this

									     .getContentResolver();

									   Uri fileUri = Uri.fromFile(mCurrentPhotoFile);

									   sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE,

									     fileUri));

									   try {

									    Thread.sleep(3000);

									   } catch (InterruptedException e) {

									    e.printStackTrace();

									   }

									   Cursor cursor = cr

									     .query(imgUri, null,

									       MediaStore.Images.Media.DISPLAY_NAME + "='"

									         + mCurrentPhotoFile.getName() + "'",

									       null, null);

									   Uri uri = null;

									   if (cursor != null && cursor.getCount() > 0) {

									    cursor.moveToLast();

									    long id = cursor.getLong(0);

									    uri = ContentUris.withAppendedId(imgUri, id);

									   }

									   final Intent intent = new Intent(

									     "com.android.camera.action.CROP");

									   intent.setDataAndType(uri, "image/*");

									   intent.putExtra("crop", "true");

									   intent.putExtra("outputX", 380);

									   intent.putExtra("outputY", 500);

									   intent.putExtra("return-data", true);

									   CutActivity.this.startActivityForResult(intent, 3);

									   break;

									  case 2:

									   break;

									  case 3:

									   if (data != null) {

									    cameraBitmap = (Bitmap) data.getExtras().get("data");

									    imageView.setImageBitmap(cameraBitmap);

									   }

									   break;

									  default:

									   break;

									  }

									  super.onActivityResult(requestCode, resultCode, data);

									 }

									 private String getPhotoFileName() {

									  Date date = new Date(System.currentTimeMillis());

									  SimpleDateFormat dateFormat = new SimpleDateFormat(

									    "'IMG'_yyyyMMdd_HHmmss");

									  return dateFormat.format(date) + ".jpg";

									 }

									}