寫在前面：
更換頭像這個功能在用戶界面幾乎是100%出現的。通過拍攝照片或者調用圖庫中的圖片，並且進行剪裁，來進行頭像的設置。
功能相關截圖如下：
下面我們直接看看完整代碼吧：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
public class UserActivity extends BaseActivity implements OnClickListener {
private ImageView iv_photo;
private Bitmap head;// 頭像Bitmap
private static String path = "/sdcard/myHead/";// sd路徑
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
initView();
initListener();
}
private void initView() {
setContentView(R.layout.activity_user);
iv_photo = (ImageView) findViewById(R.id.iv_photo);
Bitmap bt = BitmapFactory.decodeFile(path + "head.jpg");// 從SD卡中找頭像，轉換成Bitmap
if (bt != null) {
@SuppressWarnings("deprecation")
Drawable drawable = new BitmapDrawable(bt);// 轉換成drawable
iv_photo.setImageDrawable(drawable);
} else {
/**
* 如果SD里面沒有則需要從服務器取頭像，取回來的頭像再保存在SD中
*
*/
}
}
private void initListener() {
iv_photo.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.iv_photo:// 更換頭像
showTypeDialog();
break;
}
}
private void showTypeDialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
final AlertDialog dialog = builder.create();
View view = View.inflate(this, R.layout.dialog_select_photo, null);
TextView tv_select_gallery = (TextView) view.findViewById(R.id.tv_select_gallery);
TextView tv_select_camera = (TextView) view.findViewById(R.id.tv_select_camera);
tv_select_gallery.setOnClickListener(new OnClickListener() {// 在相冊中選取
@Override
public void onClick(View v) {
Intent intent1 = new Intent(Intent.ACTION_PICK, null);
intent1.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
startActivityForResult(intent1, 1);
dialog.dismiss();
}
});
tv_select_camera.setOnClickListener(new OnClickListener() {// 調用照相機
@Override
public void onClick(View v) {
Intent intent2 = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent2.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "head.jpg")));
startActivityForResult(intent2, 2);// 采用ForResult打開
dialog.dismiss();
}
});
dialog.setView(view);
dialog.show();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case 1:
if (resultCode == RESULT_OK) {
cropPhoto(data.getData());// 裁剪圖片
}
break;
case 2:
if (resultCode == RESULT_OK) {
File temp = new File(Environment.getExternalStorageDirectory() + "/head.jpg");
cropPhoto(Uri.fromFile(temp));// 裁剪圖片
}
break;
case 3:
if (data != null) {
Bundle extras = data.getExtras();
head = extras.getParcelable("data");
if (head != null) {
/**
* 上傳服務器代碼
*/
setPicToView(head);// 保存在SD卡中
iv_photo.setImageBitmap(head);// 用ImageView顯示出來
}
}
break;
default:
break;
}
super.onActivityResult(requestCode, resultCode, data);
}
/**
* 調用系統的裁剪功能
*
* @param uri
*/
public void cropPhoto(Uri uri) {
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/*");
intent.putExtra("crop", "true");
// aspectX aspectY 是寬高的比例
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
// outputX outputY 是裁剪圖片寬高
intent.putExtra("outputX", 150);
intent.putExtra("outputY", 150);
intent.putExtra("return-data", true);
startActivityForResult(intent, 3);
}
private void setPicToView(Bitmap mBitmap) {
String sdStatus = Environment.getExternalStorageState();
if (!sdStatus.equals(Environment.MEDIA_MOUNTED)) { // 檢測sd是否可用
return;
}
FileOutputStream b = null;
File file = new File(path);
file.mkdirs();// 創建文件夾
String fileName = path + "head.jpg";// 圖片名字
try {
b = new FileOutputStream(fileName);
mBitmap.compress(Bitmap.CompressFormat.JPEG, 100, b);// 把數據寫入文件
} catch (FileNotFoundException e) {
e.printStackTrace();
} finally {
try {
// 關閉流
b.flush();
b.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
|
再添加以下權限
|
1
2
3
4
|
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
<uses-permission android:name="android.permission.INTERNET" />
|
Dialog的xml文件如下：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/tv_select_gallery"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:padding="20dp"
android:text="從圖庫中選取"
android:textColor="#000"
android:textSize="20sp" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#000" />
<TextView
android:id="@+id/tv_select_camera"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:padding="20dp"
android:text="拍攝照片"
android:textColor="#000"
android:textSize="20sp" />
</LinearLayout>
|
代碼的注釋還算全面，仔細閱讀一定能看懂，大家可以試試這個demo~這樣一個更換頭像的功能就實現了。