图库选择

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

public class MainActivity extends AppCompatActivity {    private ImageView mImageView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mImageView = (ImageView) findViewById(R.id.imageView);    }    public void myClick(View view) {        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) !=                PackageManager.PERMISSION_GRANTED) {            // 如果还没授权就请求权限            ActivityCompat.requestPermissions(MainActivity.this,                    new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);        } else {            // 如果用户授权过就直接执行            viaGallery();        }    }    private void viaGallery() {        Intent intent = new Intent(Intent.ACTION_PICK, null);        intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");        startActivityForResult(intent, 100);    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if (resultCode == RESULT_OK && requestCode == 100) {            if (data != null) {                mImageView.setImageURI(data.getData());            }        }    }    @Override    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {        super.onRequestPermissionsResult(requestCode, permissions, grantResults);        switch (requestCode) {            case 1:                // 判断是否已经授权                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {                    // 执行                    viaGallery();                } else {                    // 用户拒绝授权                    Toast.makeText(this, "拒绝了浏览图库", Toast.LENGTH_SHORT).show();                }                break;        }    }}

图库选择

图库选择

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