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Code Issues Packages Projects Releases Wiki Activity

make the camera preview fullscreen

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This commit is contained in:
tibbi 2016-04-14 20:29:35 +02:00
parent 6150c51f57
commit 544694f6db
5 changed files with 186 additions and 60 deletions
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2
app/src/main/AndroidManifest.xml
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@ -16,7 +16,7 @@
android:theme="@style/AppTheme">
<activity
android:name=".MainActivity"
android:screenOrientation="portrait">
android:screenOrientation="landscape">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>

76
app/src/main/java/com/simplemobiletools/camera/MainActivity.java
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@ -4,82 +4,50 @@ import android.hardware.Camera;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.widget.RelativeLayout;
import butterknife.Bind;
import butterknife.ButterKnife;
public class MainActivity extends AppCompatActivity implements SurfaceHolder.Callback {
private static final String TAG = MainActivity.class.getSimpleName();
public class MainActivity extends AppCompatActivity {
@Bind(R.id.viewHolder) RelativeLayout viewHolder;
@Bind(R.id.surfaceView) SurfaceView surfaceView;
private Camera camera;
private boolean isOpen;
private SurfaceHolder surfaceHolder;
private static final String TAG = Preview.class.getSimpleName();
private Preview preview;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
preview = new Preview(this, (SurfaceView) findViewById(R.id.surfaceView));
preview.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
viewHolder.addView(preview);
}
@Override
protected void onResume() {
super.onResume();
openCamera();
try {
Camera camera = Camera.open(0);
preview.setCamera(camera);
} catch (Exception e) {
Log.e(TAG, "onResume IOException " + e.getMessage());
}
}
@Override
protected void onPause() {
super.onPause();
releaseCamera();
}
private void openCamera() {
isOpen = false;
try {
releaseCamera();
camera = Camera.open();
if (camera != null) {
isOpen = true;
camera.setDisplayOrientation(90);
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
}
} catch (Exception e) {
Log.e(TAG, "openCamera exception " + e.getMessage());
}
}
private void releaseCamera() {
if (camera != null) {
camera.release();
camera = null;
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
openCamera();
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
if (camera != null) {
camera.stopPreview();
}
preview.releaseCamera();
}
}

159
app/src/main/java/com/simplemobiletools/camera/Preview.java Normal file
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@ -0,0 +1,159 @@
package com.simplemobiletools.camera;
import android.content.Context;
import android.hardware.Camera;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import java.io.IOException;
import java.util.List;
public class Preview extends ViewGroup implements SurfaceHolder.Callback {
private static final String TAG = Preview.class.getSimpleName();
private SurfaceHolder surfaceHolder;
private Camera camera;
private List<Camera.Size> supportedPreviewSizes;
private SurfaceView surfaceView;
private Camera.Size previewSize;
public Preview(Context context) {
super(context);
}
public Preview(Context context, SurfaceView sv) {
super(context);
surfaceView = sv;
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
public void setCamera(Camera newCamera) {
if (camera == newCamera) {
return;
}
releaseCamera();
camera = newCamera;
if (camera != null) {
supportedPreviewSizes = camera.getParameters().getSupportedPreviewSizes();
requestLayout();
final Camera.Parameters params = camera.getParameters();
params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
camera.setParameters(params);
}
}
public void releaseCamera() {
if (camera != null) {
camera.stopPreview();
camera.release();
camera = null;
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
if (camera != null) {
camera.setPreviewDisplay(holder);
}
} catch (IOException e) {
Log.e(TAG, "surfaceCreated IOException " + e.getMessage());
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
if (camera != null) {
final Camera.Parameters parameters = camera.getParameters();
parameters.setPreviewSize(previewSize.width, previewSize.height);
requestLayout();
camera.setParameters(parameters);
camera.startPreview();
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
if (camera != null) {
camera.stopPreview();
}
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
if (changed && getChildCount() > 0) {
final View child = getChildAt(0);
final int width = r - l;
final int height = b - t;
int previewWidth = width;
int previewHeight = height;
if (previewSize != null) {
previewWidth = previewSize.width;
previewHeight = previewSize.height;
}
if (width * previewHeight > height * previewWidth) {
final int scaledChildWidth = previewWidth * height / previewHeight;
child.layout((width - scaledChildWidth) / 2, 0, (width + scaledChildWidth) / 2, height);
} else {
final int scaledChildHeight = previewHeight * width / previewWidth;
child.layout(0, (height - scaledChildHeight) / 2, width, (height + scaledChildHeight) / 2);
}
}
}
private Camera.Size getOptimalPreviewSize(List<Camera.Size> sizes, int w, int h) {
final double ASPECT_TOLERANCE = 0.1;
double targetRatio = (double) h / w;
if (sizes == null)
return null;
Camera.Size optimalSize = null;
double minDiff = Double.MAX_VALUE;
for (Camera.Size size : sizes) {
double ratio = (double) size.width / size.height;
if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE)
continue;
if (Math.abs(size.height - h) < minDiff) {
optimalSize = size;
minDiff = Math.abs(size.height - h);
}
}
if (optimalSize == null) {
minDiff = Double.MAX_VALUE;
for (Camera.Size size : sizes) {
if (Math.abs(size.height - h) < minDiff) {
optimalSize = size;
minDiff = Math.abs(size.height - h);
}
}
}
return optimalSize;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int width = resolveSize(getSuggestedMinimumWidth(), widthMeasureSpec);
final int height = resolveSize(getSuggestedMinimumHeight(), heightMeasureSpec);
setMeasuredDimension(width, height);
if (supportedPreviewSizes != null) {
previewSize = getOptimalPreviewSize(supportedPreviewSizes, width, height);
}
}
}

5
app/src/main/res/layout/activity_main.xml
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@ -1,12 +1,13 @@
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:id="@+id/viewHolder"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<SurfaceView
android:id="@+id/surfaceView"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</RelativeLayout>

4
app/src/main/res/values/styles.xml
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@ -1,8 +1,6 @@
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>