這是Intent的一個用法。

在ActivityAction里面有一個“ACTION_GET_CONTENT”字符串常量，該常量讓用戶選擇特定類型的數(shù)據(jù)。

intent.setType("image/*");? 選擇本地所有的圖片。

返回該數(shù)據(jù)的URI.我們利用該常量生成該圖片的位圖Bitmap,然后為添加到圖片控件（ImageView）上就行了。

選擇你想要的圖片：

?

?

main.xml

[java] view plaincopy

<?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"????

????>????

???<Button?????

????????android:id="@+id/button"????

????????android:layout_width="fill_parent"?????

????????android:layout_height="wrap_content"?????

????/>????

????<ImageView????

????????android:id="@+id/image"????

????????android:layout_width="fill_parent"???

????????android:scaleType="fitXY"????

????????android:layout_height="wrap_content"?????

?????/>????

</LinearLayout>???

?

[java] view plaincopy

package?xiaosi.image;??

??

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.view.View.OnClickListener;??

import?android.widget.Button;????

import?android.widget.ImageView;????

public?class?ImageActivity?extends?Activity?{????

????/**?Called?when?the?activity?is?first?created.?*/????

????private?Button?button?=?null;??

????private?ImageView?imageView?=?null;??

????@Override????

????public?void?onCreate(Bundle?savedInstanceState)?{????

????????super.onCreate(savedInstanceState);????

????????setContentView(R.layout.main);????

????????button?=?(Button)findViewById(R.id.button);????

????????button.setText("選擇圖片");????

????????button.setOnClickListener(new?ButtonListener());????

????}??

??????

????private?class?ButtonListener?implements?OnClickListener{??

??

????????public?void?onClick(View?v)??

????????{??

????????????Intent?intent?=?new?Intent();????

????????????/*?開啟Pictures畫面Type設(shè)定為image?*/????

????????????intent.setType("image/*");????

????????????/*?使用Intent.ACTION_GET_CONTENT這個Action?*/????

????????????intent.setAction(Intent.ACTION_GET_CONTENT);?????

????????????/*?取得相片后返回本畫面?*/????

????????????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?contentResolver?=?this.getContentResolver();????

?????????????try?{????

?????????????????Bitmap?bitmap?=?BitmapFactory.decodeStream(contentResolver.openInputStream(uri));????

?????????????????imageView?=?(ImageView)?findViewById(R.id.image);????

?????????????????/*?將Bitmap設(shè)定到ImageView?*/????

?????????????????imageView.setImageBitmap(bitmap);????

?????????????}???

?????????????catch?(FileNotFoundException?e){????

?????????????????Log.e("Exception",?e.getMessage(),e);????

?????????????}????

?????????}????

?????????super.onActivityResult(requestCode,?resultCode,?data);????

?????}????

}????

?

?

?

源代碼：點擊打開鏈接

轉(zhuǎn)載于:https://www.cnblogs.com/Free-Thinker/p/6722060.html

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