从相册选取照片时获取路径

发表于

我们可以借助一个隐式Intent跳转到相册来选取图片，有时候不单单是为了显示到界面上还需要获取图片文件所在的路径。

首先在AndroidManifest.mxl中声明所需的权限

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<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

通过startActivityForResult()跳转

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Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
startActivityForResult(intent, CAMERA_CHOOSE);

从相册选取照片后，在onActivityResult()里对返回的数据进行处理

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Uri uri = data.getData();
bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
ivChoose.setImageBitmap(bitmap);

完整代码如下

  • MainActivity中代码
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package com.hui.camerapicpath;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.net.Uri;
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.ImageView;
import android.widget.TextView;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
    private static final int CAMERA_CHOOSE = 0;
    private static final String TAG =  "MainActivity";
    private TextView tvPath;
    private ImageView ivChoose;
    private Button btnChoose;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tvPath = (TextView) findViewById(R.id.tv_path);
        ivChoose = (ImageView) findViewById(R.id.iv_choose);
        btnChoose = (Button) findViewById(R.id.btn_choose);
        btnChoose.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
                intent.setType("image/*");
                startActivityForResult(intent, CAMERA_CHOOSE);
            }
        });
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        Bitmap bitmap = null;
        if (resultCode == RESULT_OK) {
           if (requestCode == CAMERA_CHOOSE) {
               Uri uri = data.getData();
               Log.d(TAG, "onActivityResult: uri" + uri);
               try {
                   bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
                   ivChoose.setImageBitmap(bitmap);
               } catch (IOException e) {
                   e.printStackTrace();
               }
                tvPath.setText(uri.getPath());
           }
        }
    }
}
  • 布局文件activity_main中的代码
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
    tools:context="com.hui.camerapicpath.MainActivity"
    android:gravity="center">
    <TextView
        android:id="@+id/tv_path"
        android:textSize="22sp"
        android:textColor="#000"
        android:text="文件路径："
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <ImageView
        android:id="@+id/iv_choose"
        android:layout_width="300dp"
        android:layout_height="400dp" />
    <Button
        android:id="@+id/btn_choose"
        android:text="打开相册"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</LinearLayout>
  • 运行程序，成功选取照片后，显示如下

img