Android Studio:在Android摄像头中拍照后如何用照片替换图像按钮
Android Studio:在Android摄像头中拍照后如何用照片替换图像按钮,android,android-camera,Android,Android Camera,有人能帮我解决我遇到的问题吗? 我想制作一个活动,在其中我有一个制作照片按钮(imageButton\u add\u Playerd\u image),按下后,我的应用程序会打开相机让我拍照(仅一张照片)。 制作完照片后,我想将其发送到此活动,并将“制作照片”按钮更改为用户制作的照片(但保留“制作照片”按钮活动,以便在照片不够好的情况下,可以将照片替换为其他照片)。 我在*.java文件中的代码如下: <!-- begin snippet --> import androi
有人能帮我解决我遇到的问题吗?
我想制作一个活动,在其中我有一个制作照片按钮(imageButton\u add\u Playerd\u image),按下后,我的应用程序会打开相机让我拍照(仅一张照片)。
制作完照片后,我想将其发送到此活动,并将“制作照片”按钮更改为用户制作的照片(但保留“制作照片”按钮活动,以便在照片不够好的情况下,可以将照片替换为其他照片)。
我在*.java文件中的代码如下:
<!-- begin snippet -->
import android.app.Activity;
import android.content.Intent;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.RatingBar;
import android.widget.Toast;
import static ???.MainActivity.REQUEST_IMAGE_CAPTURE;
public class AddPlayground extends AppCompatActivity {
EditText playGroundName;
RatingBar rate;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
setContentView(R.layout.activity_add_playground);
playGroundName = (EditText) findViewById(R.id.editText_playground_name);
rate = (RatingBar) findViewById(R.id.ratingBar);
Double message = intent.getDoubleExtra(MainActivity.EXTRA_MESSAGE, 0);
Toast.makeText(this, String.valueOf(message), Toast.LENGTH_SHORT).show();
}
public void addPhoto(View view) {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
}
<!-- end snippet -->
<!-- begin snippet -->
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="???.AddPlayground">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical" android:layout_width="368dp"
android:layout_height="495dp"
android:weightSum="1"
tools:layout_editor_absoluteY="8dp"
tools:layout_editor_absoluteX="8dp">
<EditText
android:id="@+id/editText_playground_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPersonName"
android:hint="Name of playground" />
<ImageButton
android:id="@+id/imageButton_add_playground_image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.52"
android:onClick="addPhoto"
app:srcCompat="@drawable/ic_menu_camera" />
<RatingBar
android:id="@+id/ratingBar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:numStars="5"
android:visibility="visible" />
<EditText
android:id="@+id/editText_playground_comment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textMultiLine"
android:hint="Playground description" />
<Button
android:id="@+id/button_add_playground"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="addNewPlayground"
android:text="Add" />
</LinearLayout>
</android.support.constraint.ConstraintLayout>
<!-- end snippet -->
导入android.app.Activity;
导入android.content.Intent;
导入android.provider.MediaStore;
导入android.support.v7.app.AppActivity;
导入android.os.Bundle;
导入android.view.view;
导入android.widget.EditText;
导入android.widget.ImageButton;
导入android.widget.RatingBar;
导入android.widget.Toast;
导入静态???.MainActivity.REQUEST\u IMAGE\u CAPTURE;
公共类AddPlayder扩展AppCompative活动{
EditText playGroundName;
额定棒率;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
Intent=getIntent();
setContentView(R.layout.activity\u add\u游乐场);
playGroundName=(EditText)findViewById(R.id.EditText\u操场\u名称);
比率=(比率条)findViewById(R.id.比率条);
Double message=intent.getDoubleExtra(MainActivity.EXTRA_message,0);
Toast.makeText(this,String.valueOf(message),Toast.LENGTH_SHORT.show();
}
公共void addPhoto(视图){
Intent takePictureIntent=新的意图(MediaStore.ACTION\u IMAGE\u CAPTURE);
if(takePictureContent.resolveActivity(getPackageManager())!=null){
startActivityForResult(获取图片内容、请求图像捕获);
}
}
}
我在*.xml文件中的代码如下:
<!-- begin snippet -->
import android.app.Activity;
import android.content.Intent;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.RatingBar;
import android.widget.Toast;
import static ???.MainActivity.REQUEST_IMAGE_CAPTURE;
public class AddPlayground extends AppCompatActivity {
EditText playGroundName;
RatingBar rate;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
setContentView(R.layout.activity_add_playground);
playGroundName = (EditText) findViewById(R.id.editText_playground_name);
rate = (RatingBar) findViewById(R.id.ratingBar);
Double message = intent.getDoubleExtra(MainActivity.EXTRA_MESSAGE, 0);
Toast.makeText(this, String.valueOf(message), Toast.LENGTH_SHORT).show();
}
public void addPhoto(View view) {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
}
<!-- end snippet -->
<!-- begin snippet -->
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="???.AddPlayground">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical" android:layout_width="368dp"
android:layout_height="495dp"
android:weightSum="1"
tools:layout_editor_absoluteY="8dp"
tools:layout_editor_absoluteX="8dp">
<EditText
android:id="@+id/editText_playground_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPersonName"
android:hint="Name of playground" />
<ImageButton
android:id="@+id/imageButton_add_playground_image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.52"
android:onClick="addPhoto"
app:srcCompat="@drawable/ic_menu_camera" />
<RatingBar
android:id="@+id/ratingBar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:numStars="5"
android:visibility="visible" />
<EditText
android:id="@+id/editText_playground_comment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textMultiLine"
android:hint="Playground description" />
<Button
android:id="@+id/button_add_playground"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="addNewPlayground"
android:text="Add" />
</LinearLayout>
</android.support.constraint.ConstraintLayout>
<!-- end snippet -->
在下面???还有一些东西,但我删除了它,因为它对这个问题并不重要。当你开始学习教程时,你应该阅读全文。。。您有完整的文档(您的方法
addPhoto
是其中dispatchTakePictureIntent
方法的1:1副本)
简而言之,您还需要处理返回的位图(缩略图)
接收全尺寸的
位图
在上述链接文档的一节中进行了描述安卓摄像头应用程序在返回意图
中对照片
进行编码
,并将其作为附加中的一个小位图
,在键下的数据
使用下面的代码检索图像
,并将其显示在图像按钮
中
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
Bitmap imageBitmap = (Bitmap) extras.get("data");
imageButton.setImageBitmap(imageBitmap);
}
}
以下是完整代码:
import android.app.Activity;
import android.content.Intent;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.RatingBar;
import android.widget.Toast;
public class AddPlayground extends AppCompatActivity {
EditText playGroundName;
RatingBar rate;
ImageButton imageButton;
private static final int REQUEST_IMAGE_CAPTURE = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_playground);
playGroundName = (EditText) findViewById(R.id.editText_playground_name);
rate = (RatingBar) findViewById(R.id.ratingBar);
imageButton = (ImageButton) findViewById(R.id.imageButton_add_playground_image);
Intent intent = getIntent();
Double message = intent.getDoubleExtra(MainActivity.EXTRA_MESSAGE, 0);
Toast.makeText(this, String.valueOf(message), Toast.LENGTH_SHORT).show();
}
public void addPhoto(View view) {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
if(extras != null) {
Bitmap imageBitmap = (Bitmap) extras.get("data");
imageButton.setImageBitmap(imageBitmap);
}
}
}
}
确保您在AndroidManifest.xml
中添加了以下uses feature
标记以使用Camera
功能:
<manifest ... >
<uses-feature android:name="android.hardware.camera"
android:required="true" />
.......
..................
</manifest>
.......
..................
希望这会有所帮助~谢谢你。这有点帮助,但它用非常小的图像(作为图标)取代了按钮,我想把它做成一张照片,适合按钮。