在手机上面实现，设置一段时间（以秒计时）之后，自动拍照，适用于摄影师建立一个场景，之后设置时间，再进入场景。
界面主要就是一个设置时间的EditText和启动倒计时的Button，设置完时间之后，点击倒计时按钮。
|
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
|
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/frameLayout" android:layout_width="fill_parent" android:layout_height="fill_parent" > <SurfaceView android:id="@+id/imageView" android:layout_width="fill_parent" android:layout_height="fill_parent" /> <LinearLayout android:id="@+id/lineLayout" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <Button android:id="@+id/startBtn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/startTimer" android:layout_gravity="center_horizontal"/> <!-- <TextView --><!-- android:id="@+id/countDowntextView" --><!-- android:layout_width="fill_parent" --><!-- android:layout_height="fill_parent" --><!-- android:layout_gravity="center_horizontal|center_vertical|center" --><!-- android:gravity="center_horizontal|center_vertical" --><!-- android:text="@string/conutTime" --><!-- android:textSize="40sp" /> --> <EditText android:id="@+id/countDownEditTextView" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_gravity="center_horizontal|center_vertical|center" android:gravity="center_horizontal|center_vertical" android:text="@string/conutTime" android:textSize="80sp" android:inputType="number"/> </LinearLayout> </FrameLayout> |
在清单文件中加入权限：
|
1
2
3
4
|
<uses-permission android:name="android.permission.CAMERA" /> <!--下面的可不需要--><uses-feature android:name="android.hardware.camera" /> <uses-feature android:name="android.hardware.camera.autofocus" /> |
主程序：
|
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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
package cn.yh.cameradelaycontroll; import java.io.OutputStream; import java.util.Iterator; import java.util.List; import android.app.Activity; import android.content.ContentValues; import android.content.res.Configuration; import android.hardware.Camera; import android.hardware.Camera.PictureCallback; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.provider.MediaStore.Images.Media; import android.text.Editable; import android.text.TextWatcher; import android.util.Log; import android.view.Menu; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends Activity implements SurfaceHolder.Callback, OnClickListener, PictureCallback { private static final String CAMERA_CONTROLL = "CAMERA_CONTROLL"; private SurfaceView imageSView; private Button startButton; // private TextView countDownTextView; private EditText countDownEditTextView; private Camera camera; private SurfaceHolder surfaceHolder; private Handler timerUpdateHandler; private boolean timerRunning = false; private int currentTimer = 10; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); imageSView = (SurfaceView) findViewById(R.id.imageView); startButton = (Button) findViewById(R.id.startBtn); // countDownTextView = (TextView) findViewById(R.id.countDowntextView); countDownEditTextView = (EditText) findViewById(R.id.countDownEditTextView); /* countDownEditTextView.addTextChangedListener(new TextWatcher() { @Override public void onTextChanged(CharSequence s, int start, int before, int count) { // TODO Auto-generated method stub } @Override public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { // TODO Auto-generated method stub } @Override public void afterTextChanged(Editable arg0) { // TODO Auto-generated method stub currentTimer = Integer.parseInt(countDownEditTextView.getText().toString()); } }); */ surfaceHolder = imageSView.getHolder(); surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); surfaceHolder.addCallback(this); startButton.setOnClickListener(this); timerUpdateHandler = new Handler(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public void onPictureTaken(byte[] data, Camera camera) { // TODO Auto-generated method stub Uri imageFileUri = getContentResolver().insert( Media.EXTERNAL_CONTENT_URI, new ContentValues()); try { OutputStream imageFileOS = getContentResolver().openOutputStream( imageFileUri); imageFileOS.write(data); imageFileOS.flush(); imageFileOS.close(); } catch (Exception e) { // TODO Auto-generated catch block Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show(); } camera.startPreview(); } @Override public void onClick(View v) { // TODO Auto-generated method stub currentTimer = Integer.parseInt(countDownEditTextView.getText().toString()); switch (v.getId()) { case R.id.startBtn: if (!timerRunning) { timerRunning = true; timerUpdateHandler.post(timerUpdateTask); } break; } } private Runnable timerUpdateTask = new Runnable() { @Override public void run() { // TODO Auto-generated method stub if (currentTimer > 1) { currentTimer--; timerUpdateHandler.postDelayed(timerUpdateTask, 1000); } else { camera.takePicture(null, null, null, MainActivity.this); timerRunning = false; currentTimer = 10; } countDownEditTextView.setText(currentTimer + ""); } }; @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { // TODO Auto-generated method stub camera.startPreview(); } @Override public void surfaceCreated(SurfaceHolder holder) { // TODO Auto-generated method stub int cameraNums = Camera.getNumberOfCameras(); Log.e(CAMERA_CONTROLL, cameraNums + ""); try { camera = Camera.open(cameraNums - 1); } catch (Exception e) { Log.e(CAMERA_CONTROLL, e.getMessage()); } try { camera.setPreviewDisplay(holder); Camera.Parameters parameters = camera.getParameters(); if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) { parameters.set("orientation", "portrait"); camera.setDisplayOrientation(90); parameters.setRotation(90); } List<String> colorEffects = parameters.getSupportedColorEffects(); Iterator<String> cei = colorEffects.iterator(); while (cei.hasNext()) { String currentEffect = cei.next(); if (currentEffect.equals(Camera.Parameters.EFFECT_SOLARIZE)) { parameters .setColorEffect(Camera.Parameters.EFFECT_SOLARIZE); break; } } camera.setParameters(parameters); } catch (Exception e) { // TODO Auto-generated catch block // e.printStackTrace(); camera.release(); } } @Override public void surfaceDestroyed(SurfaceHolder holder) { // TODO Auto-generated method stub camera.stopPreview(); camera.release(); } } |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/yhcelebrite/article/details/11763417
