Android开发之系统相机相册使用
2014-10-21 18:15
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获取图片后进行处理，对分辨率较大的进行缩放，较小的原图显示
1、调用系统相机
[java] view
plaincopyprint?
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);// 调用系统相机
new DateFormat();
name = DateFormat.format("yyyyMMdd_hhmmss",
Calendar.getInstance(Locale.CHINA))
+ ".jpg";
Uri imageUri = Uri.fromFile(new File(PATH, name));
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);//把照片保存在sd卡中指定位置。
startActivityForResult(intent, CAMERA_TAKE);
2、调用系统相册
[java] view
plaincopyprint?
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
startActivityForResult(intent, CAMERA_SELECT);
3、在onActivityResult方法处理得到的图片
看源码吧。。。
首先简单的布局文件
[java] view
plaincopyprint?
<LinearLayout 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"
android:orientation="vertical" >
<Button
android:id="@+id/btn_take"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/take" />
<Button
android:id="@+id/btn_select"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/selectFrom" />
<ScrollView
android:id="@+id/sv_show"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:id="@+id/ll_show"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
</LinearLayout>
</ScrollView>
</LinearLayout>
源码
[java] view
plaincopyprint?
public class MainActivity extends Activity {
private Button btn_take, btn_select;
private LinearLayout ll_show;
// 请求
private static final int CAMERA_TAKE = 1;
private static final int CAMERA_SELECT = 2;
// 图片名
public String name;
// 存储路径
private static final String PATH = Environment
.getExternalStorageDirectory() + "/DCIM";
private boolean isBig = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn_take = (Button) findViewById(R.id.btn_take);
btn_select = (Button) findViewById(R.id.btn_select);
ll_show = (LinearLayout) findViewById(R.id.ll_show);
btn_take.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
takePhoto();
}
});
btn_select.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
startActivityForResult(intent, CAMERA_SELECT);
}
});
}
public void takePhoto() {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);// 调用系统相机
new DateFormat();
name = DateFormat.format("yyyyMMdd_hhmmss",
Calendar.getInstance(Locale.CHINA))
+ ".jpg";
Uri imageUri = Uri.fromFile(new File(PATH, name));
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
startActivityForResult(intent, CAMERA_TAKE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
switch (requestCode) {
case CAMERA_TAKE:
Bitmap bitmap = BitmapFactory.decodeFile(PATH + "/" + name);
Toast.makeText(this, name, Toast.LENGTH_LONG).show();
System.out.println(bitmap.getHeight() + "======"
+ bitmap.getWidth());
// 获取屏幕分辨率
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
// 图片分辨率与屏幕分辨率
float scale = bitmap.getWidth() / (float) dm.widthPixels;
Bitmap newBitMap = null;
if (scale > 1) {
newBitMap = zoomBitmap(bitmap, bitmap.getWidth() / scale,
bitmap.getHeight() / scale);
bitmap.recycle();
isBig = true;
}
//添加relative布局放置img，btn
final RelativeLayout rl_show_2 = new RelativeLayout(this);
rl_show_2.setLayoutParams(new LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT));
ImageButton imgBtn_del_2 = new ImageButton(this);
imgBtn_del_2.setBackgroundResource(android.R.drawable.ic_delete);
//设置按钮的布局规则
RelativeLayout.LayoutParams rl_2 = new RelativeLayout.LayoutParams(
new LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT));
rl_2.addRule(RelativeLayout.ALIGN_PARENT_TOP);
rl_2.addRule(RelativeLayout.ALIGN_RIGHT, 2);
// 将图片显示到界面
ImageView img = new ImageView(this);
img.setId(2);
img.setLayoutParams(new LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT));
img.setScaleType(ImageView.ScaleType.CENTER_CROP);
img.setPadding(2, 0, 0, 5);
if (isBig) {
img.setImageBitmap(newBitMap);
isBig = false;
} else
img.setImageBitmap(bitmap);
rl_show_2.addView(img);
rl_show_2.addView(imgBtn_del_2,rl_2);
ll_show.addView(rl_show_2);
imgBtn_del_2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
ll_show.removeView(rl_show_2);
}
});
break;
case CAMERA_SELECT:
ContentResolver resolver = getContentResolver();
// 照片的原始资源地址
Uri imgUri = data.getData();
try {
// 使用ContentProvider通过Uri获取原始图片
Bitmap photo = MediaStore.Images.Media.getBitmap(resolver,
imgUri);
// 获取屏幕分辨率
DisplayMetrics dm_2 = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm_2);
// 图片分辨率与屏幕分辨率
float scale_2 = photo.getWidth() / (float) dm_2.widthPixels;
Bitmap newBitMap_2 = null;
if (scale_2 > 1) {
newBitMap_2 = zoomBitmap(photo, photo.getWidth()
/ scale_2, photo.getHeight() / scale_2);
photo.recycle();
isBig = true;
}
final RelativeLayout rl_show = new RelativeLayout(this);
rl_show.setLayoutParams(new LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT));
ImageButton imgBtn_del = new ImageButton(this);
imgBtn_del.setBackgroundResource(android.R.drawable.ic_delete);
//设置按钮的布局规则
RelativeLayout.LayoutParams rl = new RelativeLayout.LayoutParams(
new LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT));
rl.addRule(RelativeLayout.ALIGN_PARENT_TOP);
rl.addRule(RelativeLayout.ALIGN_RIGHT, 1);
// 将图片显示到界面
ImageView img_2 = new ImageView(this);
img_2.setId(1);
img_2.setLayoutParams(new LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT));
img_2.setScaleType(ImageView.ScaleType.CENTER_CROP);
img_2.setPadding(2, 0, 0, 5);
if (scale_2 > 1) {
img_2.setImageBitmap(newBitMap_2);
isBig = false;
} else
img_2.setImageBitmap(photo);
//将img，btn添加
rl_show.addView(img_2);
rl_show.addView(imgBtn_del,rl);
ll_show.addView(rl_show);
imgBtn_del.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
ll_show.removeView(rl_show);
}
});
} catch (Exception e) {
// TODO: handle exception
}
break;
}
}
}
// 对分辨率较大的图片进行缩放
public Bitmap zoomBitmap(Bitmap bitmap, float width, float height) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Matrix matrix = new Matrix();
float scaleWidth = ((float) width / w);
float scaleHeight = ((float) height / h);
matrix.postScale(scaleWidth, scaleHeight);// 利用矩阵进行缩放不会造成内存溢出
Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, w, h, matrix, true);
return newbmp;
}
}
ok，结束。。
1、调用系统相机
[java] view
plaincopyprint?
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);// 调用系统相机
new DateFormat();
name = DateFormat.format("yyyyMMdd_hhmmss",
Calendar.getInstance(Locale.CHINA))
+ ".jpg";
Uri imageUri = Uri.fromFile(new File(PATH, name));
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);//把照片保存在sd卡中指定位置。
startActivityForResult(intent, CAMERA_TAKE);
2、调用系统相册
[java] view
plaincopyprint?
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
startActivityForResult(intent, CAMERA_SELECT);
3、在onActivityResult方法处理得到的图片
看源码吧。。。
首先简单的布局文件
[java] view
plaincopyprint?
<LinearLayout 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"
android:orientation="vertical" >
<Button
android:id="@+id/btn_take"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/take" />
<Button
android:id="@+id/btn_select"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/selectFrom" />
<ScrollView
android:id="@+id/sv_show"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:id="@+id/ll_show"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
</LinearLayout>
</ScrollView>
</LinearLayout>
源码
[java] view
plaincopyprint?
public class MainActivity extends Activity {
private Button btn_take, btn_select;
private LinearLayout ll_show;
// 请求
private static final int CAMERA_TAKE = 1;
private static final int CAMERA_SELECT = 2;
// 图片名
public String name;
// 存储路径
private static final String PATH = Environment
.getExternalStorageDirectory() + "/DCIM";
private boolean isBig = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn_take = (Button) findViewById(R.id.btn_take);
btn_select = (Button) findViewById(R.id.btn_select);
ll_show = (LinearLayout) findViewById(R.id.ll_show);
btn_take.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
takePhoto();
}
});
btn_select.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
startActivityForResult(intent, CAMERA_SELECT);
}
});
}
public void takePhoto() {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);// 调用系统相机
new DateFormat();
name = DateFormat.format("yyyyMMdd_hhmmss",
Calendar.getInstance(Locale.CHINA))
+ ".jpg";
Uri imageUri = Uri.fromFile(new File(PATH, name));
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
startActivityForResult(intent, CAMERA_TAKE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
switch (requestCode) {
case CAMERA_TAKE:
Bitmap bitmap = BitmapFactory.decodeFile(PATH + "/" + name);
Toast.makeText(this, name, Toast.LENGTH_LONG).show();
System.out.println(bitmap.getHeight() + "======"
+ bitmap.getWidth());
// 获取屏幕分辨率
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
// 图片分辨率与屏幕分辨率
float scale = bitmap.getWidth() / (float) dm.widthPixels;
Bitmap newBitMap = null;
if (scale > 1) {
newBitMap = zoomBitmap(bitmap, bitmap.getWidth() / scale,
bitmap.getHeight() / scale);
bitmap.recycle();
isBig = true;
}
//添加relative布局放置img，btn
final RelativeLayout rl_show_2 = new RelativeLayout(this);
rl_show_2.setLayoutParams(new LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT));
ImageButton imgBtn_del_2 = new ImageButton(this);
imgBtn_del_2.setBackgroundResource(android.R.drawable.ic_delete);
//设置按钮的布局规则
RelativeLayout.LayoutParams rl_2 = new RelativeLayout.LayoutParams(
new LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT));
rl_2.addRule(RelativeLayout.ALIGN_PARENT_TOP);
rl_2.addRule(RelativeLayout.ALIGN_RIGHT, 2);
// 将图片显示到界面
ImageView img = new ImageView(this);
img.setId(2);
img.setLayoutParams(new LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT));
img.setScaleType(ImageView.ScaleType.CENTER_CROP);
img.setPadding(2, 0, 0, 5);
if (isBig) {
img.setImageBitmap(newBitMap);
isBig = false;
} else
img.setImageBitmap(bitmap);
rl_show_2.addView(img);
rl_show_2.addView(imgBtn_del_2,rl_2);
ll_show.addView(rl_show_2);
imgBtn_del_2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
ll_show.removeView(rl_show_2);
}
});
break;
case CAMERA_SELECT:
ContentResolver resolver = getContentResolver();
// 照片的原始资源地址
Uri imgUri = data.getData();
try {
// 使用ContentProvider通过Uri获取原始图片
Bitmap photo = MediaStore.Images.Media.getBitmap(resolver,
imgUri);
// 获取屏幕分辨率
DisplayMetrics dm_2 = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm_2);
// 图片分辨率与屏幕分辨率
float scale_2 = photo.getWidth() / (float) dm_2.widthPixels;
Bitmap newBitMap_2 = null;
if (scale_2 > 1) {
newBitMap_2 = zoomBitmap(photo, photo.getWidth()
/ scale_2, photo.getHeight() / scale_2);
photo.recycle();
isBig = true;
}
final RelativeLayout rl_show = new RelativeLayout(this);
rl_show.setLayoutParams(new LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT));
ImageButton imgBtn_del = new ImageButton(this);
imgBtn_del.setBackgroundResource(android.R.drawable.ic_delete);
//设置按钮的布局规则
RelativeLayout.LayoutParams rl = new RelativeLayout.LayoutParams(
new LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT));
rl.addRule(RelativeLayout.ALIGN_PARENT_TOP);
rl.addRule(RelativeLayout.ALIGN_RIGHT, 1);
// 将图片显示到界面
ImageView img_2 = new ImageView(this);
img_2.setId(1);
img_2.setLayoutParams(new LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT));
img_2.setScaleType(ImageView.ScaleType.CENTER_CROP);
img_2.setPadding(2, 0, 0, 5);
if (scale_2 > 1) {
img_2.setImageBitmap(newBitMap_2);
isBig = false;
} else
img_2.setImageBitmap(photo);
//将img，btn添加
rl_show.addView(img_2);
rl_show.addView(imgBtn_del,rl);
ll_show.addView(rl_show);
imgBtn_del.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
ll_show.removeView(rl_show);
}
});
} catch (Exception e) {
// TODO: handle exception
}
break;
}
}
}
// 对分辨率较大的图片进行缩放
public Bitmap zoomBitmap(Bitmap bitmap, float width, float height) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Matrix matrix = new Matrix();
float scaleWidth = ((float) width / w);
float scaleHeight = ((float) height / h);
matrix.postScale(scaleWidth, scaleHeight);// 利用矩阵进行缩放不会造成内存溢出
Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, w, h, matrix, true);
return newbmp;
}
}
ok，结束。。
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