我正在制作一个记事本类型的应用程序，用户可以在其中在输入文本时拍摄和放置图片。
在我的应用程序中，我有一个button,editText和imageView. 当它开始时，只有button和editText。用户输入editText并且当他按下 时button，相机打开。拍摄的照片被放置在editText（用户输入的最后一行下方）的正下方。在图片下会editText出现一个新的，用户可以在其中输入文本。当他再次按下按钮时，另一张照片被拍摄，位于第二张下方，editText第三张editText可供用户输入文本。
因此，每次用户按下按钮拍照时，editText图像下方都会出现一个新的。这不断循环，允许用户输入文本和图像，以及他想要的任意数量的图像和段落。
但这并没有发生。我只能输入一次文字并拍一张照片。没有第二editText个出现。这里出了什么问题。
交替editText和的代码imageView位于 onActivityResult()
mainActivity.java
package com.example.nirvan.cameraexample3;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.Drawable;
import android.media.Image;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
public class MainActivity extends AppCompatActivity
{
ImageView myImage;
EditText textVar;
int flag=0; //flag==0 means place img below text, ==1 means below textVar
private String pictureImagePath = "";
Uri outputFileUri;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button imgButton=(Button) findViewById(R.id.imgButton);
View.OnClickListener imgButtonClickListener=new View.OnClickListener()
{
@Override
public void onClick(View view)
{
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = timeStamp + ".jpg";
File storageDir = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES);
pictureImagePath = storageDir.getAbsolutePath() + "/" + imageFileName;
File file = new File(pictureImagePath);
outputFileUri = Uri.fromFile(file);
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
startActivityForResult(cameraIntent, 1);
}
};
imgButton.setOnClickListener(imgButtonClickListener);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
Log.d("TAG","CUSTOOOM");
RelativeLayout relativeLayout=(RelativeLayout) findViewById(R.id.relativeLayout);
myImage=new ImageView(this);
myImage.setId(+1);
if (requestCode == 1 && resultCode == RESULT_OK)
{
File imgFile = new File(pictureImagePath);
if (imgFile.exists())
{
Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
// myImage = (ImageView) findViewById(R.id.imageViewTest);
//this code ensures the imageView is placed below the editText
RelativeLayout.LayoutParams relativeParams = new RelativeLayout.LayoutParams
(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
if(flag==0)
{
relativeParams.addRule(RelativeLayout.BELOW, R.id.text);
flag=1;
}
else if(flag==1)
relativeParams.addRule(RelativeLayout.BELOW, textVar.getId());
//myImage.setLayoutParams(relativeParams);
relativeLayout.addView(myImage,relativeParams);
//
myImage.setImageBitmap(myBitmap);
//place the new editText below the imgaeView just placed
relativeParams = new RelativeLayout.LayoutParams
(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
relativeParams.addRule(RelativeLayout.BELOW, myImage.getId());
textVar=new EditText(this);
textVar.setId(+2 );
relativeLayout.addView(textVar,relativeParams);
textVar.setText("NEW");
}
}//
}
}
mainActivity.xml
<?xml version="1.0" encoding="utf-8"?>
<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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:id="@+id/relativeLayout"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.nirvan.cameraexample3.MainActivity">
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="IMG"
android:id="@+id/imgButton"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/text"
android:layout_below="@id/imgButton"
/>
</RelativeLayout>
更新 - 接受Petrumo的建议，我修改了代码。尽管它仍然没有按应有的方式工作。拍摄第一张图像后，图像editText下方不会显示第二张图像。我已确保该方法的每次迭代的idstextView和simageView都不同。
onActivityResult() 更新
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
Log.d("TAG","CUSTOOOM");
RelativeLayout relativeLayout=(RelativeLayout) findViewById(R.id.relativeLayout);
myImage=new ImageView(this);
myImage.setId(id1++);
textVar.setId(id2++);
if (requestCode == 1 && resultCode == RESULT_OK)
{
File imgFile = new File(pictureImagePath);
if (imgFile.exists())
{
Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
// myImage = (ImageView) findViewById(R.id.imageViewTest);
//this code ensures the imageView is placed below the editText
RelativeLayout.LayoutParams relativeParams = new RelativeLayout.LayoutParams
(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
if(flag==0)
{
relativeParams.addRule(RelativeLayout.BELOW, R.id.text);
flag=1;
}
else if(flag==1)
relativeParams.addRule(RelativeLayout.BELOW, textVar.getId());
//myImage.setLayoutParams(relativeParams);
relativeLayout.addView(myImage,relativeParams);
//
myImage.setImageBitmap(myBitmap);
//place the new editText below the imgaeView just placed
relativeParams = new RelativeLayout.LayoutParams
(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
relativeParams.addRule(RelativeLayout.BELOW, myImage.getId());
textVar=new EditText(this);
//textVar.setId(id2++);
relativeLayout.addView(textVar,relativeParams);
textVar.setText("NEW");
}
}//
}
UPDATE2：所以我只是onActivityResult用Petrumo's ..替换了我的代码，它可以工作。s 出现在editText另一个下方。但是当我插入imageView代码时，应用程序在拍照后立即崩溃。
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
RelativeLayout relativeLayout=(RelativeLayout) findViewById(R.id.relativeLayout);
RelativeLayout.LayoutParams relativeParams = new RelativeLayout.LayoutParams
(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
if(textVar != null)
{
relativeParams.addRule(RelativeLayout.BELOW, textVar.getId());
}
else
{
relativeParams.addRule(RelativeLayout.BELOW, R.id.text);
}
myImage=new ImageView(this);
myImage.setId(id1++);
//set image
File imgFile = new File(pictureImagePath);
if (imgFile.exists() && requestCode == 1 && resultCode == RESULT_OK)
{
Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
relativeLayout.addView(myImage, relativeParams);
myImage.setImageBitmap(myBitmap);
}
//
textVar=new EditText(MainActivity.this);
textVar.setId(id2++);
relativeParams.addRule(RelativeLayout.BELOW, myImage.getId());
relativeLayout.addView(textVar, relativeParams);
textVar.setText("NEW");
relativeLayout.addView(textVar, relativeParams);
}
日志
FATAL EXCEPTION: main
Process: com.example.nirvan.cameraexample3, PID: 27598
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=null} to activity {com.example.nirvan.cameraexample3/com.example.nirvan.cameraexample3.MainActivity}: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
at android.app.ActivityThread.deliverResults(ActivityThread.java:3432)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3475)
at android.app.ActivityThread.access$1300(ActivityThread.java:139)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1258)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5086)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
at android.view.ViewGroup.addViewInner(ViewGroup.java:3564)
at android.view.ViewGroup.addView(ViewGroup.java:3417)
at android.view.ViewGroup.addView(ViewGroup.java:3393)
at com.example.nirvan.cameraexample3.MainActivity.onActivityResult(MainActivity.java:105)
at android.app.Activity.dispatchActivityResult(Activity.java:5446)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3428)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3475)
at android.app.ActivityThread.access$1300(ActivityThread.java:139)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1258)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5086)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)