我是一个非常新的 android 开发者，对 java 有基本的了解。我承担了一个大型项目，但遇到了一个似乎可以解决的问题。
基本上我的问题有三个不同的部分:
我需要截取我的布局。我不能只使用内置的屏幕截图功能，它需要在按下按钮时完成。
然后我需要裁剪图片，使图片只有一个
ImageView和位于它上面的TextView。 (除非有更简单的方法来做到这一点？)最后，我需要将裁剪后的图片保存到某种内存中，无论是 SD 卡、设备内存还是图库(不推荐)。
非常感谢任何帮助，非常感谢
<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"
android:id="@+id/rl"
tools:context=".Preview" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="fill_parent"
android:layout_height="80dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:scaleType="centerCrop"
android:src="@drawable/bottom_black" />
<Button
android:id="@+id/button1"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="30dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="20dp"
android:layout_marginTop="3dp"
android:background="@android:color/transparent"
android:onClick="bold"
android:text="Edit" />
<ImageView
android:id="@+id/imageView2"
android:layout_width="300dp"
android:layout_height="300dp"
android:layout_alignParentLeft="true"
android:layout_below="@+id/button1"
android:src="@drawable/block" />
<ImageView
android:id="@+id/imageView7"
android:layout_width="80dp"
android:layout_height="20dp"
android:layout_alignParentTop="true"
android:layout_alignTop="@+id/button1"
android:layout_centerHorizontal="true"
android:layout_marginTop="6dp"
android:src="@drawable/logo_black" />
<ImageView
android:id="@+id/imageView6"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignParentRight="true"
android:layout_alignTop="@+id/imageView2"
android:layout_marginRight="10dp"
android:src="@drawable/icon_fb_sel" />
<ImageView
android:id="@+id/imageView5"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignParentRight="true"
android:layout_below="@+id/imageView6"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:src="@drawable/icon_twit_sel" />
<ImageView
android:id="@+id/imageView4"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignParentRight="true"
android:layout_below="@+id/imageView5"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:src="@drawable/save" />
<ImageView
android:id="@+id/imageView3"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignBottom="@+id/imageView2"
android:layout_alignParentRight="true"
android:layout_marginRight="10dp"
android:src="@drawable/icon_trash" />
<ImageButton
android:id="@+id/imageButton1"
android:layout_width="55dip"
android:layout_height="44dip"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_marginBottom="14dp"
android:layout_marginLeft="35dp"
android:layout_marginRight="50dp"
android:layout_toLeftOf="@+id/imageView7"
android:onClick="sendMessage"
android:src="@drawable/icon_album" />
<ImageButton
android:id="@+id/imageButton2"
android:layout_width="55dip"
android:layout_height="44dip"
android:layout_alignTop="@+id/imageButton1"
android:layout_marginLeft="-30dp"
android:layout_toRightOf="@+id/imageButton1"
android:maxHeight="44dp"
android:maxWidth="55dp"
android:src="@drawable/icon_new" />
<ImageButton
android:id="@+id/imageButton4"
android:layout_width="55dp"
android:layout_height="44dp"
android:layout_alignParentRight="true"
android:layout_alignTop="@+id/imageButton2"
android:layout_marginLeft="50dp"
android:layout_marginRight="35dp"
android:layout_toRightOf="@+id/imageView7"
android:src="@drawable/icon_options" />
<ImageButton
android:id="@+id/imageButton3"
android:layout_width="55dip"
android:layout_height="44dip"
android:layout_alignTop="@+id/imageButton2"
android:layout_marginRight="-30dp"
android:layout_toLeftOf="@+id/imageButton4"
android:maxHeight="44dp"
android:maxWidth="55dp"
android:minHeight="44dp"
android:minWidth="55dp"
android:src="@drawable/icon_edit" />
<TextView
android:id="@+id/textView1"
android:layout_width="297dp"
android:layout_height="297dp"
android:layout_alignBottom="@+id/imageView2"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginBottom="5dp"
android:layout_marginLeft="3dp"
android:layout_marginTop="30dp"
android:text="text"
android:textSize="65dp" />
</RelativeLayout>
这是我的xml代码
最佳答案
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
我的布局
<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"
android:id="@+id/rl"
tools:context=".MainActivity" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="70dp"
android:text="Button" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="72dp"
android:src="@drawable/afor" />
</RelativeLayout>
我的 Activity 类
public class MainActivity extends Activity {
RelativeLayout rl;
final int PIC_CROP = 1;
ImageView iv;
File file;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rl = (RelativeLayout) findViewById(R.id.rl);
Button b= (Button) findViewById(R.id.button1);
iv= (ImageView) findViewById(R.id.imageView1);
b.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v) {
save();
}
});
}
public void save()
{
AlertDialog.Builder editalert = new AlertDialog.Builder(MainActivity.this);
editalert.setTitle("Please Enter the name with which you want to Save");
final EditText input = new EditText(MainActivity.this);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT,
LinearLayout.LayoutParams.FILL_PARENT);
input.setLayoutParams(lp);
editalert.setView(input);
editalert.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
rl.setDrawingCacheEnabled(true);
String name= input.getText().toString();
Bitmap bitmap =rl.getDrawingCache();
String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/MyDraw");
myDir.mkdirs();
file = new File (myDir, name+".png");
if (file.exists ()) file.delete ();
try
{
if(!file.exists())
{
file.createNewFile();
}
FileOutputStream ostream = new FileOutputStream(file);
bitmap.compress(CompressFormat.PNG, 10, ostream);
ostream.close();
Uri uri = Uri.fromFile(new File(file.getAbsolutePath()));
performCrop(uri);
}
catch (Exception e)
{
e.printStackTrace();
}
}
});
editalert.show();
}
private void performCrop(Uri picUri) {
try {
Intent cropIntent = new Intent("com.android.camera.action.CROP");
// indicate image type and Uri
cropIntent.setDataAndType(picUri, "image/*");
// set crop properties
cropIntent.putExtra("crop", "true");
// indicate aspect of desired crop
cropIntent.putExtra("aspectX", 1);
cropIntent.putExtra("aspectY", 1);
// indicate output X and Y
cropIntent.putExtra("outputX", 128);
cropIntent.putExtra("outputY", 128);
// retrieve data on return
cropIntent.putExtra("return-data", true);
// start the activity - we handle returning in onActivityResult
startActivityForResult(cropIntent, PIC_CROP);
}
// respond to users whose devices do not support the crop action
catch (ActivityNotFoundException anfe) {
// display an error message
String errorMessage = "Whoops - your device doesn't support the crop action!";
Toast toast = Toast.makeText(MainActivity.this, errorMessage, Toast.LENGTH_SHORT);
toast.show();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PIC_CROP) {
if (data != null) {
// get the returned data
Bundle extras = data.getExtras();
// get the cropped bitmap
Bitmap selectedBitmap = extras.getParcelable("data");
FileOutputStream ostream;
try {
ostream = new FileOutputStream(file);
selectedBitmap.compress(CompressFormat.PNG, 10, ostream);
ostream.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
iv.setImageBitmap(selectedBitmap);
}
}
}
快照
我的布局快照
点击按钮提示用户输入要保存的名称
图像裁剪并保存在图库中打开
注意:我已将裁剪后的图像保存在 sdcard 中。快照大小各不相同。 这在我的设备上对我有用。我已经发布了相同的。如果有人有更好的主意，请编辑上面的帖子。
list 文件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.cropimagefromsdcard"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.cropimagefromsdcard.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
关于java - 截图并保存android，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/16489086/