Android截圖以及加水印Demo

實現一個簡單的截圖功能以及給圖片添加水印的功能，直接上代碼！

Android截圖以及加水印Demo下載地址：

免費下載地址在 http://linux.linuxidc.com/

用戶名與密碼都是www.linuxidc.com

具體下載目錄在 /pub/Android源碼集錦/2011年/10月/Android截圖以及加水印Demo/

一、代碼實現

1. import android.app.Activity;
2. import android.graphics.Bitmap;
3. import android.graphics.Canvas;
4. import android.graphics.Color;
5. import android.graphics.Paint;
6. import android.graphics.Typeface;
7. import android.graphics.Bitmap.Config;
8. import android.os.Bundle;
9. import android.text.format.Time;
10. import android.view.View;
11. import android.view.View.OnClickListener;
12. import android.widget.Button;
13. import android.widget.ImageView;
15. public class GetAppThumbnailActivity extends Activity {
16. private Button btnThum;
17. private ImageView imgThum;
18. private ImageView imgSource;
20. @Override
21. public void onCreate(Bundle savedInstanceState) {
22. super.onCreate(savedInstanceState);
23. setContentView(R.layout.main);
24. setupViews();
25. }
27. private void setupViews() {
28. btnThum = (Button) findViewById(R.id.getThum);
29. imgThum = (ImageView) findViewById(R.id.setThum);
30. imgSource = (ImageView) findViewById(R.id.source);
32. btnThum.setOnClickListener(new OnClickListener() {
34. @Override
35. public void onClick(View v) {
36. Bitmap bitmap = getViewBitmap(imgSource);
37. Bitmap bitmap1 = createBitmap(bitmap, "haha哈哈");
38. if (bitmap1 != null) {
39. imgThum.setImageBitmap(bitmap1);
40. }
41. }
42. });
43. }
45. /**
46. * Draw the view into a bitmap.
47. */
48. private Bitmap getViewBitmap(View v) {
49. v.clearFocus();
50. v.setPressed(false);
52. boolean willNotCache = v.willNotCacheDrawing();
53. v.setWillNotCacheDrawing(false);
55. // Reset the drawing cache background color to fully transparent
56. // for the duration of this operation
57. int color = v.getDrawingCacheBackgroundColor();
58. v.setDrawingCacheBackgroundColor(0);
60. if (color != 0) {
61. v.destroyDrawingCache();
62. }
63. v.buildDrawingCache();
64. Bitmap cacheBitmap = v.getDrawingCache();
65. if (cacheBitmap == null) {
66. return null;
67. }
69. Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
71. // Restore the view
72. v.destroyDrawingCache();
73. v.setWillNotCacheDrawing(willNotCache);
74. v.setDrawingCacheBackgroundColor(color);
76. return bitmap;
77. }
79. // 給圖片添加水印
80. private Bitmap createBitmap(Bitmap src, String str) {
81. Time t = new Time();
82. t.setToNow();
83. int w = src.getWidth();
84. int h = src.getHeight();
85. String mstrTitle = "截圖時間："+t.hour + ":" + t.minute + ":" + t.second;
86. Bitmap bmpTemp = Bitmap.createBitmap(w, h, Config.ARGB_8888);
87. Canvas canvas = new Canvas(bmpTemp);
88. Paint p = new Paint();
89. String familyName = "宋體";
90. Typeface font = Typeface.create(familyName, Typeface.BOLD);
91. p.setColor(Color.BLUE);
92. p.setTypeface(font);
93. p.setTextSize(22);
94. canvas.drawBitmap(src, 0, 0, p);
95. canvas.drawText(mstrTitle, 0, 20, p);
96. canvas.save(Canvas.ALL_SAVE_FLAG);
97. canvas.restore();
98. return bmpTemp;
99. }
101. }

1. import android.app.Activity;
2. import android.graphics.Bitmap;
3. import android.graphics.Canvas;
4. import android.graphics.Color;
5. import android.graphics.Paint;
6. import android.graphics.Typeface;
7. import android.graphics.Bitmap.Config;
8. import android.os.Bundle;
9. import android.text.format.Time;
10. import android.view.View;
11. import android.view.View.OnClickListener;
12. import android.widget.Button;
13. import android.widget.ImageView;
15. public class GetAppThumbnailActivity extends Activity {
16. private Button btnThum;
17. private ImageView imgThum;
18. private ImageView imgSource;
20. @Override
21. public void onCreate(Bundle savedInstanceState) {
22. super.onCreate(savedInstanceState);
23. setContentView(R.layout.main);
24. setupViews();
25. }
27. private void setupViews() {
28. btnThum = (Button) findViewById(R.id.getThum);
29. imgThum = (ImageView) findViewById(R.id.setThum);
30. imgSource = (ImageView) findViewById(R.id.source);
32. btnThum.setOnClickListener(new OnClickListener() {
34. @Override
35. public void onClick(View v) {
36. Bitmap bitmap = getViewBitmap(imgSource);
37. Bitmap bitmap1 = createBitmap(bitmap, "haha哈哈");
38. if (bitmap1 != null) {
39. imgThum.setImageBitmap(bitmap1);
40. }
41. }
42. });
43. }
45. /**
46. * Draw the view into a bitmap.
47. */
48. private Bitmap getViewBitmap(View v) {
49. v.clearFocus();
50. v.setPressed(false);
52. boolean willNotCache = v.willNotCacheDrawing();
53. v.setWillNotCacheDrawing(false);
55. // Reset the drawing cache background color to fully transparent
56. // for the duration of this operation
57. int color = v.getDrawingCacheBackgroundColor();
58. v.setDrawingCacheBackgroundColor(0);
60. if (color != 0) {
61. v.destroyDrawingCache();
62. }
63. v.buildDrawingCache();
64. Bitmap cacheBitmap = v.getDrawingCache();
65. if (cacheBitmap == null) {
66. return null;
67. }
69. Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
71. // Restore the view
72. v.destroyDrawingCache();
73. v.setWillNotCacheDrawing(willNotCache);
74. v.setDrawingCacheBackgroundColor(color);
76. return bitmap;
77. }
79. // 給圖片添加水印
80. private Bitmap createBitmap(Bitmap src, String str) {
81. Time t = new Time();
82. t.setToNow();
83. int w = src.getWidth();
84. int h = src.getHeight();
85. String mstrTitle = "截圖時間："+t.hour + ":" + t.minute + ":" + t.second;
86. Bitmap bmpTemp = Bitmap.createBitmap(w, h, Config.ARGB_8888);
87. Canvas canvas = new Canvas(bmpTemp);
88. Paint p = new Paint();
89. String familyName = "宋體";
90. Typeface font = Typeface.create(familyName, Typeface.BOLD);
91. p.setColor(Color.BLUE);
92. p.setTypeface(font);
93. p.setTextSize(22);
94. canvas.drawBitmap(src, 0, 0, p);
95. canvas.drawText(mstrTitle, 0, 20, p);
96. canvas.save(Canvas.ALL_SAVE_FLAG);
97. canvas.restore();
98. return bmpTemp;
99. }
101. }