我真的很新,并且正在浏览Android Studio上的一些教程,以获得一些帮助来创建一个简单的图像视图,只需从图库中选择一个图像并将其显示在页面上。我可以点击并拉出画廊但是从画廊中选择图像后它不会显示。我查看了几个教程,但是我没有看到任何遗漏的东西?有什么帮助吗?
android manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="adamnate.ddproject" >
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme" >
<activity android:name=".MainActivity" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission a
ndroid:名称= “android.permission.WRITE_EXTERNAL_STORAGE”/&GT;
MainActivity.xml
package adamnate.ddproject;
import android.content.Intent;
import android.net.Uri;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
public class MainActivity extends AppCompatActivity {
private static final int RESULT_LOAD_IMAGE = 1;
ImageView imageToUpload;
Button bUploadImage;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageToUpload = (ImageView) findViewById(R.id.imageToUpload);
bUploadImage = (Button) findViewById(R.id.bUploadImage);
imageToUpload.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), 1);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode ==11)
imageToUpload.setImageURI(data.getData());
}
}
}
activity_main
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:padding="10dp"
android:layout_height="match_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="150dp"
android:layout_height="150dp"
android:id="@+id/imageToUpload"
android:layout_gravity="center_horizontal" />
<Button
android:id="@+id/bUploadImage"
android:text="Upload Image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
</ScrollView>
答案 0 :(得分:0)
使用此
requestCode == 1
而不是
requestCode == 11
因为你在调用startActivityForResult()
时在requestCode参数上放了1