android 下如果做处理图片的软件 可以调用系统的控件 实现缩放切割图片 非常好的效果 今天写了一个demo分享给大家 嘿嘿。
package cn.m15.test; import java.io.ByteArrayOutputStream; import java.io.File; import android.app.Activity; import android.content.Intent; import android.graphics.Bitmap; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.provider.MediaStore; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.ImageView; public class testActivity extends Activity { public static final int NONE = 0; public static final int PHOTOHRAPH = 1;// 拍照 public static final int PHOTOZOOM = 2; // 缩放 public static final int PHOTORESOULT = 3;// 结果 public static final String IMAGE_UNSPECIFIED = "image/*"; ImageView imageView = null; Button button0 = null; Button button1 = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); imageView = (ImageView) findViewById(R.id.imageID); button0 = (Button) findViewById(R.id.btn_01); button1 = (Button) findViewById(R.id.btn_02); button0.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(Intent.ACTION_PICK, null); intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, IMAGE_UNSPECIFIED); startActivityForResult(intent, PHOTOZOOM); } }); button1.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "temp.jpg"))); startActivityForResult(intent, PHOTOHRAPH); } }); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (resultCode == NONE) return; // 拍照 if (requestCode == PHOTOHRAPH) { //设置文件保存路径这里放在跟目录下 File picture = new File(Environment.getExternalStorageDirectory() + "/temp.jpg"); startPhotoZoom(Uri.fromFile(picture)); } if (data == null) return; // 读取相册缩放图片 if (requestCode == PHOTOZOOM) { startPhotoZoom(data.getData()); } // 处理结果 if (requestCode == PHOTORESOULT) { Bundle extras = data.getExtras(); if (extras != null) { Bitmap photo = extras.getParcelable("data"); ByteArrayOutputStream stream = new ByteArrayOutputStream(); photo.compress(Bitmap.CompressFormat.JPEG, 75, stream);// (0 - 100)压缩文件 imageView.setImageBitmap(photo); } } super.onActivityResult(requestCode, resultCode, data); } public void startPhotoZoom(Uri uri) { Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(uri, IMAGE_UNSPECIFIED); intent.putExtra("crop", "true"); // aspectX aspectY 是宽高的比例 intent.putExtra("aspectX", 1); intent.putExtra("aspectY", 1); // outputX outputY 是裁剪图片宽高 intent.putExtra("outputX", 64); intent.putExtra("outputY", 64); intent.putExtra("return-data", true); startActivityForResult(intent, PHOTORESOULT); } }<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /> <ImageView android:id="@+id/imageID" android:adjustViewBounds="true" android:maxWidth="50dip" android:maxHeight="50dip" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <Button android:id="@+id/btn_01" android:layout_height="50dip" android:text="相册" android:layout_width="150dip"/> <Button android:id="@+id/btn_02" android:layout_height="50dip" android:text="拍照" android:layout_width="150dip"/> </LinearLayout>
