android SD卡图片浏览

来源：互联网发布：人工智能待遇编辑：程序博客网时间：2024/05/16 12:19

在ActivityAction里面有一个“ACTION_GET_CONTENT”字符串常量，该常量让用户选择特定类型的数据，并返回该数据的URI.我们利用该常量，然后设置类型为“image/*”，就可获得android手机内的所有image。

main.xml ：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<Button
android:id="@+id/b01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<ImageView
android:id="@+id/iv01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>

Lesson_01_Pic.java:

package com.yfz;
import java.io.FileNotFoundException;
import android.app.Activity;
import android.content.ContentResolver;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
public class Lesson_01_Pic extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button button = (Button)findViewById(R.id.b01);
button.setText("选择图片");
button.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View v) {
Intent intent = new Intent();
/* 开启Pictures画面Type设定为image */
intent.setType("image/*");
/* 使用Intent.ACTION_GET_CONTENT这个Action */
intent.setAction(Intent.ACTION_GET_CONTENT);
/* 取得相片后返回本画面 */
startActivityForResult(intent, 1);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
Uri uri = data.getData();
Log.e("uri", uri.toString());
ContentResolver cr = this.getContentResolver();
try {
Bitmap bitmap = BitmapFactory.decodeStream(cr.openInputStream(uri));
ImageView imageView = (ImageView) findViewById(R.id.iv01);
/* 将Bitmap设定到ImageView */
imageView.setImageBitmap(bitmap);
} catch (FileNotFoundException e) {
Log.e("Exception", e.getMessage(),e);
}
}
super.onActivityResult(requestCode, resultCode, data);
}
}